Tourists walking on a footpath and exploring the magnificent postojna cave in slovenia, a popular tourist attraction

visitor visitors stalagtite stalagtites stalactite stalactites dripstone cave dripstone caves stalactite cave stalactite caves dripstone dripstones cave caves nature open air slovenia tourist tourists holidaymaker holidaymakers underground subterranean belowground europe europe's tourism geology geology tourist attraction tourist attractions place of interest famous place famous places sight landmark tourist landmark places of interest tourist spot natural landmark landscape landscapes scenery sceneries landscape photograph countryside landscape shot landscape photo southeast europe southeastern europe slovenian slovene balkans balkan balkan peninsula european way ways path paths geologic geological one person 1 person single person exploration exploring popular favored favoured liked karst cave karst caves travel photography postojna adelsberg postumia stalagmite stalagmites postojna cave postojna caves path paths trail hiking path hiking paths hiking trail hiking trail hiking trails hiking trails walking trail walking trails foot path