azish or azishskaya cave in adigeya, russia

azishskaya cave geology limestone speleology grotto cavern stalagmite nature underground stone russia rock wet adygea old mountain mystery stalagnat speleothem mineral karst deep stalactite aisish antre big vault column mainsail tunnel grot hole hollow landscape fantasy maikop formation light subterranean ancient inside geological stairs azish dark hike visit path walk