Gombasecká Cave

The cave is located at the western foot of the Silická Plateau in the Slovak Karst National Park. The entrance to the cave lies 11 m above the Black Spring at an altitude of 250 m.

It is formed in Mesozoic Middle Triassic light Wetterstein limestones, dark grey Gutenstein limestones, light grey limestones and dolomitic limestones along tectonic faults by the corrosive and erosive activity of the Black Brook and its occasional tributary from Marble Hall. It is part of the Silicko-Gombasecká underground hydrological system, which also includes the Silická glacier cave. The two caves are separated by a hitherto unknown section of the Black Stream. It rises to the surface through the Black Spring at the foot of the plateau, 11 m above the valley floodplain of the Slana River.

Gombasecká Cave is a river cave with a length of 3057 m. The two floors consist of oval river-modelled and fissure passages, in some places widened by collapsing into halls and domes. The upper floor is 5 to 10 m above the active channel of the Black Stream, which flows through the lower parts of the cave. The dry passage on the upper floor was created by the waters that now occasionally emerge through the 10 m deep well in Marble Hall.

The cave stands out for its unique thin sinter straws - thin tubular stalactite formations that reach up to 3 m in length. Other forms of stalactites, stalagmites, various sinter coatings and crusts also occur.