Where: Bashkiria National Park, Bashkortostan
Length: 9860 meters

The longest cave in the Urals. You can get into it only through a vertical shaft 116 meters deep. Speleologists or trained travelers with climbing equipment descend here.

There are three levels inside the cave, with long flat sections. Sometimes the tunnels expand into halls and galleries of impressive size. The largest room is the “Assembly Hall” grotto. Its length is 130 meters and its width is about 10. It justifies its name not only by its size, but also by the domed shape of the ceiling. Inside the grotto you can see a small lake.