Situated in the Medzevska Upland at its joint with the east margin of the Jasovska Plateau of the Slovak Karst, near Jasov. It is located in the National Nature Reserve Jasovske dubiny, in the territory of the Protected Landscape Area and Biospheric Reserve of the Slovak Karst. It was formed in the Middle Triassic dolomites and limestones by the former ponor waters of Bodva river, at five developmental levels. It reaches the length of 2,122 m. Rich sinter filling is represented by pagoda-like stalagmites, stalagnates, shields, drums, straw stalactites and other forms. 17 species of bats have been found in the cave with dominating Rhinolophus ferrumequinum, being one of the most important winter refuges of this species in Slovakia. It was inhabited by man in the Neolithic Era "bukovohorska" culture), Bronze Age, Halstadt and Roman Era. Sporadic findings indicate also a possible short-term Palaeolithic settlement. Its existence was documented already in the second half of the 12th century. The oldest inscription dates back to 1452. It has been publicly accessible since 1846. After reconstruction it was reopen for the public in 1924. It has been serving for speleotherapeutical procedures since 1995. The show track is 550 m long.