Geoheritage and Geotourism Contribution to Tourism Development in Protected Areas of Slovakia—Theoretical Considerations

Slovakia is renowned for its remarkable and rare natural beauty, abundant in natural resources with several noteworthy geological features. However, the protection of nature has primarily been understood as the protection of biodiversity in Slovakia. For the conservation of geological diversity and landforms, very little has been done. Geoconservation or the protection of geodiversity is being applied to specific places known as geosites, where significant earth elements (geological, paleontological, geomorphological, hydrological and pedological) are protected, preserved and managed. Most geosites benefit from existing protected areas. Their protection is random and does not result from the recognition of their values. As discussed in the paper, geotourism related activities can undoubtedly contribute to promoting the protection of geosites in protected areas. Besides, through a geotourism approach, geodiversity can obtain public attention and positively influence the state of protected areas by its activities. Such initiatives not only can improve the protection of geological sites but also can play a crucial role in sustainable tourism development.


Introduction
Names such as defense or protecting the homeland denoted the first intentions of protecting rare natural sites in the past [1,2]. The idea of preserving remarkable and unique natural phenomena has dominated since the announcement of the first protected areas in the world [3]. Within these first initiatives, the decisive factors in nominating regions to be protected were beauty, magnificence and rarity rather than the criterion the natural value of phenomena [4]. Subsequently, human society became aware of the relationship to the past, which can be expressed not only by art but also through preserved nature, which must be protected. From the human-being perspective, there has been a long-standing perception that nature works independently of human society, so human activities do not affect global natural processes and general features of the environment. However, technical innovations enabled society to use more efficiently natural resources. Protected areas have become islands in an industrial and urbanized landscape with all adverse developmental purposes. In addition to that, only the untouched and undisturbed natural system, such as an old-growth forest, was considered suitable candidate for nature conservation. At the turn of the century, scientists rejected a recognized view and supported the notion that man is part of nature and biodiversity [5,6]. Currently, especially from a euro-centric perspective, a view prevails that it is extremely important to know the interactions and relationships of man and biodiversity if we want to protect nature [7][8][9][10].
However, the recent situation in many countries is that conservation is understood as biodiversity protection primarily, despite the fact that the natural environment comprises biodiversity and

Nature Protection, Tourism and Geoheritage-Literature Overview
Tourism as an economic activity can generate growth and employment. It also contributes to economic and social development and integration, as regards rural and mountain areas and peripheral and very remote areas [21][22][23][24][25]. In addition to these benefits, the expected growth in tourism and its new trends can make a positive contribution to the sustainability of protected areas and to the development potential of their surrounding areas and local communities. Tourism can become the main instrument for preserving these areas but also for raising awareness of the environment of the population and visitors.
The relationship between tourism and protected areas is as old as the history of protected areas. As mentioned by Wilson et al. (2009) [25], the relationship between tourism and protected areas is complex resulting from the distinct economic focus of tourism on one side and the conservation focus of protected areas on the other side. The importance of this relationship lies in confrontation, which can raise awareness of the value of nature and lead to ecological behavior and conservation activities. Tourism can represent a key role in providing information on protected areas and raising awareness among tourists about the environmental consequences of their activities [26,27] and has a potential to become an important tool for preserving these areas. These positive impacts of tourism can be achieved through funding and education programs, by disseminating appropriate information for tourism participants and residents of protected areas. Various authors e.g., [28,29] refer to the potential positive contribution of tourism in protected areas, which is shown in Table 1. However, risks and negative impacts of tourism in protected areas may occur affecting ecosystems, soils, vegetation, water, air and wildlife [28]. Potential negative effects of tourism in protected areas may include: disruption of wildlife breeding cycles and behaviors, degradation or damage of natural diversity features, destruction of ecosystems, increase of pedestrian and vehicular traffic, soil erosion, noise increase, pollution, water shortage, degradation or loss of natural landscape and historic sites, collection of rare minerals and species [28,[30][31][32][33][34][35]. Table 1. Potential benefits of tourism in protected areas [28].

Enhancing Economic Opportunity
Increases jobs for local residents The positive impact of tourism, in terms of dissemination of information among visitors, goes back to the beginnings of increasing interest and attendance of people in protected areas. This initiated the need to guide their movement in protected areas. Moreover, it was necessary to instruct the visitors in an unforced way, while visitors follow the guide or proceed from one interpretational panel to another along the tourist trail. In this regard, lesser number of restrictions is required to control the movement of tourists in the area. The purpose was to encourage the visitor to understand nature conservation. These reasons led to the formation of the first nature trails in the United States, at Harriman State Park's Station, to identify and study interesting plants, insects and other natural features [36]. Later, especially after World War II, such trails began were built in Germany [37].
Inappropriate management of tourism development can lead to negative impacts, which include loss of aesthetic value, increased noise levels, emissions generation, solid waste and littering, deforestation due to building construction, soil erosion, pollution of surface and underground waters and air pollution, ecosystem disruption, destruction of national parks due to use of vehicles and landscape, change thus reducing their attractiveness for visitors.
According to Dingwall, when considering geological heritage, support for geological features is only implicit and included in terms such as natural features, scenery, and ecosystems [38]. In most countries, concerns about the protection of biodiversity are paramount, and in a legal sense, nature protection is essentially synonymous with biological protection. Many international nature conservation organizations, although using the generic term nature conservation, tend to be synonymous with "wildlife conservation". Milton summed up the situation well, stating that diversity in nature is usually considered to be a diversity of living nature [39]. Therefore, in contrast to the protection of biological, aesthetic and cultural values, protection of geoheritage rarely followed national strategy, based on unified criteria and recognition of the scientific value as the main criterion. From the perspective of nature protection, only minor importance was attached to geodiversity because living nature appeared more vulnerable than inanimate nature. Unquestionably, even the inanimate part of nature is undergoing long-term development [40,41].
Not only organizations but also most people associate nature protection with biodiversity protection. Geodiversity protection is an area of nature conservation that is not well understood, but it seems to be changing. There is a very close link between geodiversity and biodiversity. A holistic approach to the conservation of natural diversity can be achieved by managing and preserving both the living and inanimate aspects of the natural world, in contrast to nature conservation towards a traditional biocentric focus. Biodiversity depends on geodiversity. Nevertheless, the geological, geomorphological and pedological basis was practically overlooked. However, this basis is a prerequisite for evolution and development of living nature in any part of the world [11,42,43].
The reworking of the International Union for Conservation of Nature (IUCN) definition of a protected area has brought a fundamental change in its primary focus from biodiversity to a broader nature concept [44]. The contrast between the previous definition and the current definition is evident from the following. Definition of the 1994 protected area is: "an area of land or sea that is specifically dedicated to the protection and conservation of biodiversity, natural and related cultural resources." Current definition: "a clearly defined geographical space that is recognized, reserved and managed by legal or other effective means to achieve long-term nature conservation with associated ecosystem services and cultural values". Subsequently, the Summit in Spain, at the IUCN Protected Areas Summit, in Almeria, discussed the extension of the definition of diversity in the year 2007. The summary of proceedings reflects the statement that 'protected areas should address a range of diversity issues, including the need to protect geological and soil diversity [44].
In summary, IUCN directly recognizes that geodiversity is part of natural diversity, and geological heritage is part of natural heritage. They also acknowledge their scientific, cultural, aesthetic, landscape, economic and intrinsic value, represented by geodiversity and the importance of geodiversity in promoting biological, cultural and landscape diversity.
Natural sites of geo(morpho)logical importance have been visited for a long time [45][46][47]. Nowadays, the most effective way to promote and protect geoheritage, especially from the tourism development perspective, is geotourism. The concepts of geodiversity and geotourism are related to the geological environment in the abiotic sphere and emphasize the role of geological and geomorphological elements. Sharples pointed out the importance of geoconservation of geodiversity for future generations. Geotourism plays a crucial role in this context because it puts into practice geoconservation and promotes its understanding among the general public [48].
Similarly, authors such as Reynard [49] and Zouros [50] suppose that the protection of geological heritage depends on the public perception that it must be preserved. Therefore, the best way to protect it is to connect the public to the geoheritage. This purpose is stated in the definition of geotourism proposed by Hose [51]. Geotourism means providing interpretative facilities and services to promote the value and social benefits of geological and geomorphological sites and their materials and to ensure their protection for use by students, tourists and other occasional vacationers.
Geotourism is a form of cultural and environmental tourism that can develop in areas with sites of significant geological heritage that are used to attract visitors [52][53][54].
Other authors similarly focus on "geo" in geotourism, which concerns geology and geomorphology and natural resources of the landscape, reliefs, fossil deposits, rocks and minerals, with an emphasis on valuation the processes that have created such functions [55]. The same authors reviewed this definition a few years later, adding that geotourism promotes tourism for geosite and the conservation of geodiversity and the understanding of natural sciences through recognition and learning [56].
The Arouca Declaration (12 November 2011, Portugal; available online at: http://www. europeangeoparks.org/?p=223) states that geotourism should be defined as tourism that maintains and enhances the identity of the territory, taking into consideration its geology, environment, culture, aesthetics, heritage and the well-being of its inhabitants. Geological tourism is one of several parts of geotourism [57].
To summarize the approaches that have emerged concerning geotourism, it is clear that there are two concepts: (a) sensu stricto (lat. limited) geotourism as a form of tourism aimed at exploring geological phenomena -collecting fossil substances, etc.; (b) sensu lato (lat. in broad terms) geotourism, including all forms of tourism, carried out on Earth; in a geographical sense.
Moreover, as defined by National Geographic, geotourism is also defined as tourism that maintains or enhances the geographical character of a place, its environment, culture, aesthetics, heritage and the well-being of its inhabitants [58].
To bring people, especially general public, closer to geological heritage, geoparks can be considered the most effective places. Here, tourists visit various geological features, use geological walkways and lookout points, geographic activities and visitor centers for "geoinformation". Besides, thanks to the meaningful and unforgettable experiences offered by geoparks, visitors can have a deeper awareness and connection with the geological heritage.
A geopark is a unified area that advances the protection and use of geological heritage in a sustainable way, and promotes the economic well-being of the people who live there [59]. Therefore, a geopark is a territory that represents a heritage, not only from a geological point of view. It can also be important for archaeological, ecological, economic, historical and cultural reasons. All these aspects should be associated with sustainable development [60,61]. Besides, geoparks create opportunities for the development of the local economy. Geoparks have a better connection with local social and cultural life in comparison to national, natural or regional parks [62]. It is also important to note that geoparks are not national protected areas that are dependent on national laws. Recognizing the role of geoparks in sustainable use and protection of geoheritage, many publications on various aspects of this topic have been written in the last decade e.g., [63][64][65][66][67][68][69][70][71].

Nature Protection and Geoheritage in Slovakia
The territory of Slovakia, thanks to varied geological structure ( Figure 1) and complex geomorphological evolution, includes geodiversity of various values ( Figure 2, Table 2) that may be used as a remarkable resource of (geo)tourism development not only in geopark areas. However, most of geologically significant sites are not protected in Slovakia [72]. There is no specific act on geoheritage or geosites protection in Slovakia. Therefore, the protection of geoheritage/geosites in Slovakia has to be considered from the broader context of general nature protection. Nature protection in Slovakia is regulated via the Act No. 543/2002 Coll. of 25 June 2002 on Protection of Nature and Landscape [73] and Executive Decree to the Act No. 24/2003 [74].    However, in the Act nor in the Decree, there is no mention about geosite. However, to stay objective, geological objects are mentioned several times in the Act, e.g., in § 2 par. 2, letter b, ecosystem rock and minerals (rocks, minerals, fossils, morphology forms, soil types, lakes, springs, ponors, geysers) are mentioned; in letter c, significant landscape element or a part of a territory creating characteristic landscape or contributes to its ecological stability (peatbog, cliff, gorge, block sea, sand dune) is mentioned; § 24 of this act declares cave and waterfall as a natural monument; and according to § 33 par. 2, mineral and fossils are included among a protected species [73].
This Act defines large-scale and small-scale areas or sites of nature protection: national park, protected landscape area, protected area, nature reserve, national nature reserve, natural monument, national natural monument, protected landscape element, and protected bird area [73]. The total number of 9 national parks, 14 protected landscape areas (  Kilík [78] states that, although the title of the Act also mentions the protection of the landscape, the law does not deal with it practically. The law should clearly define competences and obligations of stakeholders. Many protected geological sites gain benefits from other protective frameworks that already exist in their territories (national parks, biosphere reserves and others) [72]. These allow the preventive conservation of geological and geomorphological sites.
A National Nature Monument or Nature Monument is usually used to protect remarkable geological or geomorphological elements of heritage in Slovakia. Due to their size and importance, national parks and protected landscape areas are crucial areas where geoconservation strategies need to be implemented and public awareness raised of all aspects of nature, biological and geological nature [19]. The following tables (Tables 3 and 4) show numbers of important geological sites that are part of large-scale protected areas and small-scale protected areas in Slovakia.  Kilík [78] states that, although the title of the Act also mentions the protection of the landscape, the law does not deal with it practically. The law should clearly define competences and obligations of stakeholders. Many protected geological sites gain benefits from other protective frameworks that already exist in their territories (national parks, biosphere reserves and others) [72]. These allow the preventive conservation of geological and geomorphological sites.
A National Nature Monument or Nature Monument is usually used to protect remarkable geological or geomorphological elements of heritage in Slovakia. Due to their size and importance, national parks and protected landscape areas are crucial areas where geoconservation strategies need to be implemented and public awareness raised of all aspects of nature, biological and geological nature [19]. The following tables (Tables 3 and 4) show numbers of important geological sites that are part of large-scale protected areas and small-scale protected areas in Slovakia. Table 3. Number of important geological sites within the large-scale protected areas in Slovakia [79].

Number of Important Geological Sites
Protected Landscape Area 84 National Park 65 Buffer Zone of the National Park 28 Table 4. Number of important geological sites within the small-scale protected areas in Slovakia [79].

Number of Important Geological Sites
National Nature Monument The Geological Institute of Dionyz Stur has identified assemblage of geological sites within the Slovak Republic. The database (available online at: https://apl.geology.sk/g_vgl/?jazyk=en) includes 480 sites [79], which are divided into nine categories according to their character ( Table 5). Most of the stratigraphic and paleontological sites are not protected by law, but these sites are characterized by scientific, educational and aesthetic value. As well, they have the potential to become not only an important geological heritage site in Slovakia but also in Europe [80]. Each site record contains detailed geological characteristics of the site, degree and reason of protection, localization on the tourist as well as geological map. As reported by Lukáč and Baláž [81], 271 of important geological sites in Slovakia defined by the State Geological Institute of Dionyz Stur are not a subject of any protection according to the Act on Protection of Nature and Landscape [73].

Tourism in Protected Areas in Slovakia
The first program for building educational trails and educational sites was developed in Slovak protected areas in 1984 [82]. As summarized by Bizubová and Nevřelová [83], based on the state program, guides to educational trails had more or less uniform design with a polythematic focus and similar content with a strong emphasis on nature conservation. The educational trails were distinguished according to the length of short (up to 5 km), medium (up to 15 km) and long (over 15 km). It could also be nature trails with the possibility of guide service, without or combined. At that time, 15 educational trails and 20 educational sites were created at a similar ideological and technical level in Slovakia, of which 15 were accessible caves. These include the Jasovska Cave, opened for the first time in 1846, or the first nature trail of Slovakia, which was built in the National Nature Reserve Dunajec Breach in 1960. Over time, many other hiking trails were created that served people as an educational opportunity [84]. Since the end of the 20th century, other organizations have been among the implementers of nature trails and other activities included in the information system of nature trails in Slovakia. In addition to the State Nature Conservation and the Slovak Environmental Agency, these are, e.g., Administration of Slovak Caves, State Forests of the Slovak Republic, individual forest plants, municipalities, micro-regions, various interest groups, civic associations, schools, or individuals [83].
Because it was particularly important to think about environmental education, the first school in Gbelany was established in 1979, thanks to Mr. Pagac. The school intended to provide environmental education for professionals and the general public [84].
Nowadays, information centers perform similar tasks as the school in Gbelany. Unfortunately, according to the Enviroportal (Information portal of the Ministry of Environment of the Slovak Republic, accessible at: https://www.enviroportal.sk/en/about-enviroportal) only half of the protected-large areas have information centers. As a result, we lose one of the exceptional opportunities for guiding and educating visitors [85].
As reported in the latest State of The Environment in the Slovak Republic [80], for tourists, the most attractive destinations are the national parks, yet these are potentially the most vulnerable to tourist activity. From the tourism and recreation perspective, national parks and protected areas are currently the subjects of increasing interest. All this suggests that the trend of interest in protected areas will proceed in the coming years [30]. This is confirmed by the state of the environment reports of the Slovak Republic, according to which we can observe for several years, that the most attractive areas for tourism include national parks [86]. The environmental impact of tourism can be notably observed in these areas with intensive tourism, also because the intensity of tourist attendance is not equally distributed in protected areas. Besides, the concepts of zoning and carrying capacity of the territory are yet to be implemented in the majority of protected areas of Slovakia. Areas for mountain tourism activities are concentrated in the territory of Tatra NP, NP Low Tatras and NP Mala Fatra.
The motives to visit Slovakia that predominated among foreign visitors were: interest in highly valued natural sites and activities in compliance with the requirements of sustainable development [86]. This reflects the growing interest in the quality of the natural environment and the need for lower environmental impacts of tourism. Concerning this, we can observe the increasing interest in nature-based alternative forms of tourism such as ecotourism, geotourism, rural tourism and others for several years. These forms of sustainable tourism are one of the ways to decrease negative impacts on nature. It also represents sustainable economic development for the protected area. McKercher [87] refers to several reasons to support sustainable tourism:

1.
Focuses on the quality of the experience; 2.
The basis of the products comprise the local resources of the protected area (culture, traditions, shops and others); 3.
Provides employment opportunities for the local population; 5.
Allows local people to participate in development and decision-making; 6.
Supports the preservation of natural and cultural values by providing economic incentives; 7.
Allows the visitor contact with the region and increases interest in the environment [87].
National parks and protected areas in Slovakia are currently the subjects of increasing levels of tourism and recreation. According to the Statistical Office of the Slovak Republic, a quarter of tourism in the country is concentrated in the Bratislava Region. However, it is more important for us that the second-highest tourist attendance has been shown for a long time by the Žilina Region (north-western part of the country), followed by the Prešov Region (north-eastern part of the country) [88]. In Slovakia, these two regions are of the highest concentration of areas with nature-based tourism attractiveness and potential (national parks, protected landscape areas, internationally protected areas). As well, the highest area concentration of accommodation facilities includes a compact continuous area of the High, West and Low Tatras, the Great and Small Fatra with adjacent areas of the Poprad, Liptov, Turčianska Basin and the Horehronie valley. This area of northern Slovakia is a gate to many protected areas. It records a total of 4-5 million overnight stays in accommodation facilities, which represents approximately 40% of the total number of overnight stays in Slovakia [89]. The highest share in the demand is the High Tatras region, which is the target region for visiting the Tatra National Park [88]. However, the total number of tourists in protected areas in Slovakia are only estimations based on one-day-counting of tourists/visitors at specific locations in protected areas. Such methodology is absolutely inaccurate, strongly depending on specific conditions during the day. Therefore, the final estimation of the total number of tourists in protected area per year may significantly differ from reality. According to internal data of State Forests of the Tatra National Park, Figure 4 shows the numbers of tourists in the high mountain range of the Tatra NP during the counting day in August. Cognition of the visitor's motives [54,[88][89][90][91] is one of the measures that will contribute to recognizing possible negative impacts of tourism activities on natural and cultural-historical resources. In Slovakia, there is a large proportion of foreign transit visitors or overnight visitors who represent a group contributing relatively less to the overall tourism income [88]. Besides, they cause congestion of main traffic routes, which contributes to the negative impact on the environment. On the contrary, short and long-term visitors bring a considerable economic effect, as they have higher expenses on accommodation and catering facilities and other additional services. They thus positively influence the development of tourism and replace the possible burden on the environment to a certain extent [88].
As reported in the latest available State of the Environment in the Slovak Republic, a positive fact concerning the natural environment is that the number of sites designated for mountain tourism activities has stagnated or slightly have increased since 2001. By contrast, the number of accommodation facilities is increasing in the long term [86,88].
A significant environmental problem is an increase in the length of marked hiking trails affected by erosion, which are located above the upper boundary of the forest. The reason is unfavorable conditions of soil and vegetation regeneration due to extreme climatic conditions [86,88]. Critical soil erosion occurs in the territory of NP Low Tatras, NP Mala Fatra, NP Muranska Planina and in the territory of Tatra NP. Although erosion has a rising trend in recent years, the situation has stabilized. Lately, there has been an increase in the length of erosion of the affected cycle paths. It concerns to the cycling routes in NP Pieniny, NP Low Tatras and Tatra NP [86].
The endangering of small-scale protected areas due to tourism activities in the years 2000-2015 was most apparent in the areas of the Tatra NP, NP Low Tatras

Discussion
Nature provides space and conditions for human life, for its activities, for satisfying its needs. Man transforms nature by exploiting it. One must constantly adapt to the changes that have occurred. The impact of its activities on nature and biodiversity has increased considerably in the last century [92]. Individual factors, such as human activity, natural disturbances and disasters, rarely act independently on nature. The point is mostly a synergistic effect [7]. Moreover, environmental degradation affects not only biodiversity but also geodiversity, which is its precondition.
According to Ložek, a rich natural heritage becomes a victim of today's inconsiderate civilization. This also occurs in places where there is no economic justification [93]. Zweckbronner Cognition of the visitor's motives [54,[88][89][90][91] is one of the measures that will contribute to recognizing possible negative impacts of tourism activities on natural and cultural-historical resources. In Slovakia, there is a large proportion of foreign transit visitors or overnight visitors who represent a group contributing relatively less to the overall tourism income [88]. Besides, they cause congestion of main traffic routes, which contributes to the negative impact on the environment. On the contrary, short and long-term visitors bring a considerable economic effect, as they have higher expenses on accommodation and catering facilities and other additional services. They thus positively influence the development of tourism and replace the possible burden on the environment to a certain extent [88].
As reported in the latest available State of the Environment in the Slovak Republic, a positive fact concerning the natural environment is that the number of sites designated for mountain tourism activities has stagnated or slightly have increased since 2001. By contrast, the number of accommodation facilities is increasing in the long term [86,88].
A significant environmental problem is an increase in the length of marked hiking trails affected by erosion, which are located above the upper boundary of the forest. The reason is unfavorable conditions of soil and vegetation regeneration due to extreme climatic conditions [86,88]. Critical soil erosion occurs in the territory of NP Low Tatras, NP Mala Fatra, NP Muranska Planina and in the territory of Tatra NP. Although erosion has a rising trend in recent years, the situation has stabilized. Lately, there has been an increase in the length of erosion of the affected cycle paths. It concerns to the cycling routes in NP Pieniny, NP Low Tatras and Tatra NP [86].
The endangering of small-scale protected areas due to tourism activities in the years 2000-2015 was most apparent in the areas of the Tatra NP, NP Low Tatras, NP Mala Fatra, NP Pieniny and NP Slovak Paradise. Within the Protected Landscape area, it was mainly the Protected Landscape Area of Dunajské luhy, Protected Landscape Area of Malé Karpaty, Protected Landscape Area of Strážovské vrchy, Protected Landscape Area of Pol'ana, Protected Landscape Area of Cerová vrchovina and Protected Landscape Area of Vihorlat [86].

Discussion
Nature provides space and conditions for human life, for its activities, for satisfying its needs. Man transforms nature by exploiting it. One must constantly adapt to the changes that have occurred. The impact of its activities on nature and biodiversity has increased considerably in the last century [92]. Individual factors, such as human activity, natural disturbances and disasters, rarely act independently on nature. The point is mostly a synergistic effect [7]. Moreover, environmental degradation affects not only biodiversity but also geodiversity, which is its precondition.
According to Ložek, a rich natural heritage becomes a victim of today's inconsiderate civilization. This also occurs in places where there is no economic justification [93]. Zweckbronner refers to the fact that the relationship of man and technology to nature can be described as exploitation at the turn of the 17th and 18th centuries; later as exploitation; at present, it is capture and manipulation [94]. Nature can exist without human society, but its protection can only work in connection with human society [95]. In this regard, the need to discuss the importance of environment, both living and abiotic, is more than actual.
Tourism has the ability to provide people contact with nature and the environment. This confrontation can spread awareness of environmental issues, the value of nature and lead to environmental behavior and environmental protection activities [27,96,97]. However, for the well-preserved and most valuable parts of nature, the widest range of restrictions are often adopted as shown in the Table 6 on the example of Slovakia. Such strict protection rules in the most valuable areas in Slovakia, which often have the highest geotourism development potential (e.g., NP Slovak Karst vs. area of potential Silica Geopark, PLA Vihorlat and PLA Latorica vs. area of potential Zemplín Geopark), significantly limit tourism development activities. A harmonious relationship between nature and tourism is possible, in particular, through appropriate management, a clear protection strategy and a suitable policy tool for tourism, e.g., [98][99][100][101]. ---P A-approval of the nature protection authority is required; P-activities are prohibited; -restriction is not mentioned in the act, (edits by: the act for the protection of nature and landscape).
According to the Tourism Development Strategy of the Slovak Republic until 2020, the strategic goal of tourism in Slovakia until 2020 is to increase the competitiveness of tourism and thus to make better use of its potential. One of the tasks of competitiveness is the creation of tourism products using the natural potential of the country with regard to the limits of protected areas. In addition, supporting new national tourism products based on active leisure is preferred. Another aim of the task is to create specific regional tourism products focused on (1) soft forms of tourism, (2) typical local activity, (3) experience programs for visitors, and (4) the creation and maintenance of quality educational trails.
Geotourism development related activities, based on the presence of geological heritage in protected areas, is one of the potential solutions of several aims of the tourism development strategy document in Slovakia. As national parks have been among the most attractive tourist areas in Slovakia in last several years, the impact of tourism on the environment can be most clearly observed in these areas with intense tourism as discussed by, e.g., Pickering et al. [102]. However, geotourism is one of the tourism forms using the natural potential of the country with regard to the limits of protected areas. Regarding effective use of geoheritage for (geo)tourism development, it is crucial to consider various aspects affecting geosite visits as discussed by various authors [53,[103][104][105]. Here, it must be said that potential visitors of geosites from different countries may prefer different criteria. In Slovakia, according to the study of Štrba, the following criteria are the most important to visit geosite: visual attractiveness of locality, access, visit safety, uniqueness/rarity, information availability, tour/visit difficulty, time-limited visit, tour/visit length, possibility to gain knowledge and number of tourists [53]. Such criteria are met in areas of geoparks presenting various features of geodiversity and related cultural and historical aspects.
The As can be seen in the above-mentioned list, the majority of potential geopark areas in Slovakia, at least partially, overlap protected area(s) ( Figure 5). The establishment of geoparks thus seems to be a good opportunity for Slovakia to achieve geoconservation of its resources and as well to support the sustainable development of its regional areas. The natural features of a country are very vulnerable. Sustainable use is one of the options if we want this resource preserved and used in the long term. Therefore, geoconservation is an essential point in the development of geotourism in vulnerable areas, such as protected areas in Slovakia. The necessity to build and operate geoparks in Slovakia has been highlighted in the Programme Statement of the Slovak Government in 2012. However, a major problem in the development of geoparks in Slovakia is that geoparks are under-capitalized and that there is currently no direct financial support or other regular subsidy mechanism for their management, which is currently implemented by interest associations of legal entities or civic associations [108].

Conclusion
Knowledge and awareness of nature protection have been improving in Slovakia during the last decade [109][110][111][112][113]. However, appropriate strategies are still needed for managing and ensuring the survival of wildlife, landscapes, and reliefs. Slovakia has numerous protected areas managed by the State Nature Conservancy of the Slovak Republic. However, many of the abiotic natural phenomena are subjects of no legal protection [72,78,81]. Geological heritage located in protected areas is often a place of significant tourism and recreation potential [11,54,55]. Effectively adopting geotourism principles [114], geotourism and geoheritage promotion and geoconservation may undoubtedly contribute to tourism development, on one hand, and to natural heritage protection, on the other.
In this regard, owing to the limited work and cooperation between current biodiversity conservationists and Earth scientists, it is important to integrate and connect biotic and geological conservation, for instance, by suggesting geoconservation in precisely these protected areas that are already recognized by local authorities and people living and working in them. If we want to give a post to geodiversity and geological heritage directly in the nature conservation program, the geoconservation community must work to ensure that geodiversity and geological heritage in protected areas take on considerable importance in the local, national and international context. Activities related to the effective development of geotourism can significantly contribute to this, in terms of geotourism concept. However, one of the key questions "Why should people visit geosites?" should be answered before planning geoheritage based tourism development in any area. In this field, still just a limited number of relevant publications is available [52,53,90,91,[103][104][105][115][116][117][118][119]. As concluded by Różycka and Migoń [91], different types of visitors may have different reasons and motivations, not necessarily focused on geoheritage values. Hence, they will perceive geosites in various ways. However, these reasons may be interrelated since various values are often coupled. Therefore, when considering geoheritage's potential contribution to the development of nature-based forms of tourism, much more research focused on potential geosite visitors is required to have relevant data from the demand side. The necessity to build and operate geoparks in Slovakia has been highlighted in the Programme Statement of the Slovak Government in 2012. However, a major problem in the development of geoparks in Slovakia is that geoparks are under-capitalized and that there is currently no direct financial support or other regular subsidy mechanism for their management, which is currently implemented by interest associations of legal entities or civic associations [108].

Conclusions
Knowledge and awareness of nature protection have been improving in Slovakia during the last decade [109][110][111][112][113]. However, appropriate strategies are still needed for managing and ensuring the survival of wildlife, landscapes, and reliefs. Slovakia has numerous protected areas managed by the State Nature Conservancy of the Slovak Republic. However, many of the abiotic natural phenomena are subjects of no legal protection [72,78,81]. Geological heritage located in protected areas is often a place of significant tourism and recreation potential [11,54,55]. Effectively adopting geotourism principles [114], geotourism and geoheritage promotion and geoconservation may undoubtedly contribute to tourism development, on one hand, and to natural heritage protection, on the other.
In this regard, owing to the limited work and cooperation between current biodiversity conservationists and Earth scientists, it is important to integrate and connect biotic and geological conservation, for instance, by suggesting geoconservation in precisely these protected areas that are already recognized by local authorities and people living and working in them. If we want to give a post to geodiversity and geological heritage directly in the nature conservation program, the geoconservation community must work to ensure that geodiversity and geological heritage in protected areas take on considerable importance in the local, national and international context. Activities related to the effective development of geotourism can significantly contribute to this, in terms of geotourism concept. However, one of the key questions "Why should people visit geosites?" should be answered before planning geoheritage based tourism development in any area. In this field, still just a limited number of relevant publications is available [52,53,90,91,[103][104][105][115][116][117][118][119]. As concluded by Różycka and Migoń [91], different types of visitors may have different reasons and motivations, not necessarily focused on geoheritage values. Hence, they will perceive geosites in various ways. However, these reasons may be interrelated since various values are often coupled. Therefore, when considering geoheritage's potential contribution to the development of nature-based forms of tourism, much more research focused on potential geosite visitors is required to have relevant data from the demand side.