Klass7
The largest cave in the Ural Mountains.  Tge cave is 9860 meters in length.   The entrance is a 110 meter derp pit.  Only experienced cavers with extensive equipment and vertical skills can enter this cave.  Tge lower sections of the cave have been flooded by dam construction on the adjacent river. (OSM data version: 2016-12-14T16:41:03Z) #mapsme