stalactite and stalagmit mineral formation in a cave

punkva caves macocha moravia czech republic cave located pustafrac12 canyon tourist information centre mlafrac12 restaurant upstream river moravian karst skalni mlyn nature underground kras gorge water dark rock cavern stalagmite stalactite limestone geology light labyrinth tunnel scenic exploration moravsky punkevni explore speleology grotto stalactical adrenaline darkness stone explorer subterranean natural adventure beauty sport column vault extreme tourism deep curtain hill speleologist stalagmit mineral formation