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Kőlyuk of Kishartyán – A Gateway to the Miocene Past in the Novohrad–Nógrád Geopark

Located on the western edge of the village of Kishartyán, the Kőlyuk (“Stone Hole”) is a striking natural cavity carved into a limestone cliff.

  • Parking available

More information

This barrow-shaped formation is not only a remarkable geological phenomenon but also a key geosite within the Novohrad–Nógrád UNESCO Global Geopark. It offers a fascinating window into the Miocene history of the Carpathian Basin and highlights the erosive power of nature over millions of years.

Geological Significance

The Kőlyuk is found in Middle Miocene marine deposits known as Leitha limestone, formed some 15–16 million years ago when the region was covered by the warm, shallow waters of the ancient Pannonian Sea. The porous and less compact layers within the sedimentary rock were gradually dissolved by infiltrating rainwater, resulting in the formation of this natural cave-like hollow—a textbook example of karstification.

The cliff wall showcases the horizontal stratification typical of marine limestone, and sometimes even contains fossil imprints such as shells. Visitors can observe various forms shaped by chemical weathering—cracks, cavities, and solution features—making this a highly instructive site for geological education.

Natural Values and Visitor Experience

Beyond its geological relevance, the Kőlyuk and its surroundings are rich in biodiversity. The limestone-based grasslands and shrublands provide habitats for unique flora and fauna, while the elevated position of the rock face makes it a good lookout point for birdwatching and nature photography.

A short hiking path leads to the site, making it easily accessible for families with young children or elderly visitors. Its scenic and educational qualities make it a valuable destination for school groups and eco-tourists alike.

Role within the Geopark

The Novohrad–Nógrád Geopark aims not only to conserve natural heritage but also to make it accessible and meaningful to local communities and visitors. The Kőlyuk exemplifies this mission: it is a geoscientific site that also offers aesthetic, recreational, and educational value. Its integration into the Geopark enhances local identity, promotes environmental awareness, and contributes to the development of sustainable tourism in the region.

Target group

  • Class trips
  • Families with younger children
  • Families with older children
  • Multigenerational programs
  • Friends
  • Seniors
  • Couples

Other services

  • Type of public space
    • Natural formation
  • Recommended
    • Children
    • Visitors looking for free activities
    • Adventurers
    • Honeymoon
    More Info
  • How much time does it require?
    • 1-2 hours
  • Is it free?
    • Free
  • Do you have to book in advance?
    • Can be visited without booking
  • Is it guided?
    • Can be discovered individually
  • Seasons
    • Autumn
    • Summer
    • Sring

Sights, programs

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The National Shrine of Mátraverebély-Szentkút The National Shrine of Mátraverebély-Szentkút Mátraverebély-Szentkút is a place where silence becomes presence, and where water not only quenches thirst, but opens the soul. A pilgrimage site that honours the past, serves the present, and embraces responsibility for the future—a model destination for sustainable, values-driven tourism.
Former Quarry of Sámsonháza, Geological Interpretive Site Former Quarry of Sámsonháza, Geological Interpretive Site The former quarry located on the southern peak of Vár Hill, near the village of Sámsonháza, is one of the outstanding geotourism sites of the Novohrad–Nógrád UNESCO Global Geopark.

Parking information

  • Free outdoor parking available