cave - punkevni, macocha, czech republic

abyss accessible archeology bottom canyon cave cavern caves climb czech danger darkness desolate enables entrance expedition explorer extreme fact from gained geologic geological geology glen grotto inside journey karst kilometers lifestyle located macocha mill mine moravian most mountaineering mystery natural orange popular popularity punkevni punkva republic rock rockwall rocky speleologist speleology stalagmites stone thanks that underground visitors wall