beautiful chemogenic deposits in karst caves in the form of formations hanging from the ceiling. punkva caves in the czech republi

abyss adventure ancient beautiful beauty brno cave cavern caves ceiling chemogenic column comb czech dark darkness deposits explorer extreme form formation formations fringe geology gorge grotto hanging icicle icicles inside jeskyne karst kras labyrinth light limestone majestic mineral monument moravia moravian moravsky nature punkevni punkva republi republic rock speleology stalactical stalactite stalactites stalagmite stalagmites stone straws subterranean underground wall