illuminated picturesque karst rock formations in balcarka cave, moravian karst, czech: moravsky kras, czech republic

abyss adventure balcarka beauty cave cavern caves chamber czech dark darkness deep discover dungeon explore footpath formation geologic geology heritage illuminated indoor inside interior karst labyrinth light limestone morava moravia moravian national natural nature place railings rock scene sightseeing stalactite stalagmite stone tourism tunnel underground unique