big azishskaya cave in adygea.

adygea aisish antre azishskaya big break broken cave cavern column dark deep den environment fantasy formation geology grot grotto harm hollow karst landscape limestone mainsail mineral mountain natural nature old potholing rock russia scathe section speleology speleothem spelunking stalactite stalagant stalagmite stalagnat stone subterranean tourism travel tunnel underground vandal vandalism vault wall wet