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

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