alushta, crimea - november 07, 2017: emine-bair-khosar or mammoth cave. the cave opened in 1927. the main route is about 700 mete

amazing attraction bair beautiful calcite cave cavern caving chamber chatyr colorful column crimea dah decorated earth emine flowstone formation geologic geology hall hosar illuminated illumination interior karst landmark light limestone mineral mountain natural nature rock russian speleology speleothem stalactite stalagmite stalagnates stone structure subterranean tourism touristic travel underground unique wall