new athos cave. abkhazia.

abkhasia abkhazia abyss afon anakopia athos attraction bridge calcite caucasus cavate cave crystals dark darkness falls ground hall helictites icicles indoor interior iver iverian karst landmark largest metal mountain mountains new nobody novoafonskaya novy old pedestrian rocks russian sightseeing space spelaean spelean stalactite stalagmite stone tourist under underground vault void