It is located in the Visoka Polyana area, southeast of the former Climatic School, the entrance is at 450 m. above sea level. It consists of three connected floors with a total length of 86 m. There is an ascending air current, dendrite formations can be observed. Fragments of ceramics, fossils, a cave bear tooth were found there. The first discoverers of this cave were children who were camping in the area, according to Vesselin Hlebarov. This happened in 1924. Three years later, Hlebarov, together with two other people, explored the cave. Their equipment was scarce, but they had beginner's luck. Hlebarov hit himself and dropped his lantern, after which he fell into the lower level of the cave. He managed to get out without serious injuries, and the result of the adventure was the discovery of more floors in the cave. Exploration in 1965 indicates that there was a tomb in the rock cavities, probably Thracian, but it was looted and destroyed by treasure hunters.