The picturesque Potočka zijalka cave is situated at an altitude of 1675m on the southern slope of Olševa (1929m) in the eastern Karavanke mountains. The large entrance opens to the south. The cave is 115m long, 20-40m wide, and the ceiling is from 4-10m high. It was created from the Upper Triassic Dachstein limestone, which is tectonically heavily fractured. Archaeological excavations of the cave by professor Srecko Brodar in the years 1928-1935 indicate the start of Slovenian Palaeolithic research. The cave is important due to its mountain location and the discovery of numerous bones of Palaeolithic hunters.