punkva caves in the moravian karst czech republic

0000 171112 05052013 adventure ancient and archaeology arrangement awe beauty big brno calcium cave caves czech dark deep destinations dirty discovery effect exploration geography geology gorge grotto group hole icicle inside journey karst lake large light limestone macocha many mineral moravia moravian nature object objects past people photography physical punkva republic rock rough speleology spooky stages stalactite stalactites stalagmite stalagmites stone sunbeam tourism travel underground vacations vertical visit water