Caves of Aggtelek Karst and Slovak Karst


World Heritage Identification Number: 725

World Heritage since: 1995

Category: Natural Heritage

WHE Type: Natural Landscapes & Geographic Features

Transboundary Heritage: Yes

Endangered Heritage: No

Country: Hungary, Slovakia

Continent: Europe

UNESCO World Region: Europe and North America

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Exploring the Geological Wonders of the Caves of Aggtelek Karst and Slovak Karst

The Caves of Aggtelek Karst and Slovak Karst, a unique and captivating UNESCO World Heritage Site, is a mesmerizing collection of over 1000 karst caves sprawled across a vast area of approximately 55,800 hectares along the shared borders of Hungary and Slovakia. This extraordinary site offers a glimpse into the rich tapestry of geological history spanning tens of millions of years.

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UNESCO Description of the World Heritage Site

The variety of formations and the fact that they are concentrated in a restricted area means that the 712 caves currently identified make up a typical temperate-zone karstic system. Because they display an extremely rare combination of tropical and glacial climatic effects, they make it possible to study geological history over tens of millions of years.

UNESCO Justification of the World Heritage Site

Criteria (viii): The property Caves of Aggtelek and Slovak Karst, while typical of many karst localities in Europe, is distinctive in its great number (with 712 recorded at time of inscription) of different types of caves found in a concentrated area. Geological processes causing karst features to be buried by sediment and then later reactivated or exhumed provide evidence pertaining to the geologic history of the last tens of millions of years. Relicts of pre-Pleistocene karst (i.e. more than about 2 million years old) are very distinct in the area, and many of them show evidence for sub-tropical and tropical climate forms. These include rounded hills that are relicts of tropical karst later modified by Pleistocene periglacial weathering. This suite of paleokarst features, showing a combination of both tropical and glacial climates, is very unusual and is probably better documented in the Slovak Karst than anywhere else in the world.

Encyclopedia Record: Caves of Aggtelek Karst and Slovak Karst

The Caves of Aggtelek Karst and Slovak Karst are a series of over 1000 karst caves spread out over a total area of 55,800 ha along the border of Hungary and Slovakia. With an exceptional diversity of karst structures and complex cave systems developing from both temperate and tropical processes, the caves and surrounding areas were inscribed as a UNESCO World Heritage Site in 1995.

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Additional Site Details

Area: 56,650.57 hectares

Number of Components: 7

UNESCO Criteria: (viii) — Outstanding example representing major earth stages

Coordinates: 48.47573 , 20.48687

IUCN World Heritage Outlook

The 2025 Conservation Outlook on Caves of Aggtelek Karst and Slovak Karst reports the following assessment:

Good

Source: International Union for Conservation of Nature (IUCN) · View assessment

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Image of Caves of Aggtelek Karst and Slovak Karst

© Jojo, en:Jojo_1, pl:Jojo, CC BY-SA 3.0 Resized from original. (This derivative is under the same CC BY-SA license.)

World Heritage Research

Discover scientific research and academic studies that deepen our understanding of Caves of Aggtelek Karst and Slovak Karst from its history and significance to its conservation, management, and contemporary challenges.

  • LiDAR-Based Morphometry of Dolines in Aggtelek Karst (Hungary) and Slovak Karst (Slovakia)

    LiDAR-based morphometry reveals that doline density in the Aggtelek Karst and Slovak Karst UNESCO World Heritage Sites is 25% higher when derived from high-resolution digital terrain models (DTMs) compared to traditional topographic maps. This study introduces a new parameter, k, which characterizes the 3D shape of dolines, indicating whether they resemble cylinders, bowls (calottes), cones, or funnels. Most dolines in the region exhibit transitional shapes between bowl and cone forms. The research also highlights that doline density is negligible on slopes steeper than 12° and that 75% of dolines are associated with Wetterstein Limestone. Additionally, the lognormal distribution effectively models the size distribution of doline areas.

    Telbisz, T., Mari, L., & Székely, B. (2024). LiDAR-Based Morphometry of Dolines in Aggtelek Karst (Hungary) and Slovak Karst (Slovakia). Remote Sensing, 16(5), 737. https://doi.org/10.3390/rs16050737

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  • Attitudes and perceptions of local residents and tourists – a comparative study of the twin national parks of Aggtelek (Hungary) and Slovak Karst (Slovakia)

    A comparative study of the twin national parks, Aggtelek (Hungary) and Slovak Karst (Slovakia), reveals that while both local residents and tourists generally hold positive views toward these UNESCO World Heritage Sites, a notable minority of locals express dissatisfaction, likely due to perceived limited influence over park decisions. The research highlights that forests are the most visited natural resource by locals, whereas caves are the primary attraction for tourists. Despite minimal conflict between locals and tourists, both groups support increased tourism. Additionally, the study identifies a small but significant segment of visitors who consider themselves geotourists, though geotourism is not widely recognized among locals or park management. The research also notes that cave tourism in Hungary is largely driven by school education, while the term 'karst' is less familiar to visitors, particularly on the Hungarian side. The study employed a questionnaire survey to gather data on attitudes and perceptions.

    Telbisz, T., Mari, L., Gessert, A., Nestorová Dická, J., & Gruber, P. (2022). Attitudes and perceptions of local residents and tourists – a comparative study of the twin national parks of Aggtelek (Hungary) and Slovak Karst (Slovakia). Acta Carsologica, 51(1), 93–109. https://doi.org/10.3986/ac.v51i1.10683

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  • Social assessment of national parks through the example of the Aggtelek National Park

    Local communities near the Aggtelek National Park and Slovak Karst National Park perceive national parks as economic barriers, limiting their ability to diversify local economies. While national parks aim to protect geological and biological values while promoting tourism, interviews with settlement leaders revealed conflicts arising from restrictions on economic activities imposed by these protected areas. Many locals view national park authorities negatively, questioning the necessity of nature conservation—a sentiment linked to past socialist regimes. The study highlights a need for shifting attitudes toward more positive engagement with conservation efforts in karst regions.

    Kőszegi, M., Gessert, A., Nestorová-Dická, J., Gruber, P., & Bottlik, Z. (2022). Social assessment of national parks through the example of the Aggtelek National Park. Hungarian Geographical Bulletin, 71(2), 149–162. https://doi.org/10.15201/hungeobull.71.2.4

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  • Redescription of two troglobiotic species of Deuteraphorura Absolon, 1901
    (Collembola, Onychiuridae) from the Western Carpathians

    A detailed redescription of two troglobiotic species, Deuteraphorura kratochvili and D. schoenviszkyi, from the Western Carpathian caves reveals their unique morphological traits, including the absence of pseudocelli on thoracic tergum I and the presence of a male ventral organ on abdominal terga II–III. Both species are obligate cave-dwelling forms (troglobionts), restricted to subterranean environments. The study examines intraspecific variability in D. kratochvili from its type locality, Demänovská Cave System, while D. schoenviszkyi is redescribed based on specimens from both Slovak and Aggtelek Karst, where the type locality is situated. An identification key for Deuteraphorura species lacking pseudocelli on thoracic segment I is also provided, aiding in their taxonomic differentiation.

    PARIMUCHOVÁ, A., & KOVÁČ, Ľ. (2016). Redescription of two troglobiotic species of Deuteraphorura Absolon, 1901
    (Collembola, Onychiuridae) from the Western Carpathians. Zootaxa, 4168(2). https://doi.org/10.11646/zootaxa.4168.2.6

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  • Distributional patterns of cave Collembola (Hexapoda) in association with habitat conditions, geography and subterranean refugia in the Western Carpathians

    A study of 28 caves in the Western Carpathians, including UNESCO World Heritage Sites Aggtelek Karst and Slovak Karst, reveals that southern and central karst regions serve as critical glacial refugia for subterranean fauna. The research identified 90 Collembola species, with 13 troglobiotic (obligate cave-dwelling) species concentrated in the southern and southeastern parts of the region. Species diversity correlated positively with internal air temperature but negatively with elevation and latitude, indicating environmental and geographic influences on distribution. Non-metric multidimensional scaling (NMS), cluster, and indicator value analyses further demonstrated distinct geographic patterns in Collembola communities, with northern areas showing lower diversity and no troglobiotic taxa.

    Kováč, Ľ., Parimuchová, A., & Miklisová, D. (2015). Distributional patterns of cave Collembola (Hexapoda) in association with habitat conditions, geography and subterranean refugia in the Western Carpathians. Biological Journal of the Linnean Society, 119(3), 571–592. Portico. https://doi.org/10.1111/bij.12555

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  • Semi-automated recognition of planation surfacesand other flat landforms: a case study from theAggtelek Karst, Hungary

    Researchers identified the r.geomorphon module as the most effective method for semi-automated recognition of planation surfaces and other flat landforms in the Aggtelek Karst, Hungary. These surfaces serve as morphological indicators of different evolutionary stages, correlating with cave levels formed under stagnant erosion base conditions. The study tested multiple methods, including slope gradient thresholding and r.param.scale modules, but found that r.geomorphon best delineated relatively flat surfaces corresponding to phases of the Jósva River incision. This approach offers a new tool for reconstructing the comprehensive evolution of karst landscapes, with implications for understanding similar geological formations in UNESCO World Heritage Sites like the Aggtelek Karst and Slovak Karst.

    Veselský, M., Bandura, P., Burian, L., Harciníková, T., & Bella, P. (2015). Semi-automated recognition of planation surfacesand other flat landforms: a case study from theAggtelek Karst, Hungary. Open Geosciences, 7(1). https://doi.org/10.1515/geo-2015-0063

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Last updated: September 5, 2026

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