Aggteleki Nemzeti Park (Aggtelek National Park) lies at the border to the Slovak Republic in the north east of Hungary. The Gömör Torna Karst Area has a size of 80.000 ha, 19.762 ha on the hungarian side. This area became National Park in 1985. It contains 14 cave systems and nearly 240 smaller or larger caves.
A large, horizontal water system is the cave of the Jósva stream. Here is the second deepest cave of Hungary, the 240m deep Vecsem-bükki Shaft. The Baradla Domica Cave System is famous for its formations and is the longest cave system with 25km.