Velebit caves
The "Lukina jama" cave is 1431 m deep (2013), the deepest cave in Croatia, 14th deepest cave in the world and the deepest cave in southeast Europe. At its foot, there are ponds and streams including one of the largest known colonies of subterranean leeches ("Erpobdella mestrovi"), which has been ascertained to represent a new species, genus and also family. Other species discovered in the system, include the air-breathing land snails "Zospeum tholussum". Like Lukina jama, Slovacka jama, Velebita and Meduza are also located at the "Hajdučki i Rožanski kukovi" special reserve, a dedicated part of the Sjeverni Velebit national park.
Kinderle Cave
The entrance to the cave is located at an altitude of 94 m and is connected to an inclined tunnel. In the tunnel is a glacier measuring 720 square m and a thickness of 8 m. Various stalagmites grow on the glacier. The length of the cave is 8130 m, including 230 m under water. The volume of the cave is 229600 cubic meters, the floor area is 39400 square meters. The average width of the pass is 5.4 m, the height is 7.1 m. The amplitude of the corridors is 215 m, this is the deepest cave in the Urals. Around the cave grows cannabis, so the Bashkirs called the cave Kinderle. They kept meat on the glacier in the summer.