Sandstone caves, multicoloured due to various oxides, containing carved tombs, historic and archaeological Nabataean city of Petra, UNESCO World Heritage Site, Jordan, Middle East

petra jordan unesco sandstone caves nabataean tombs archaeology heritage historical site ancient rock carvings travel exploration cave formation colors oxides cultural significance tourism geology heritage site historic near east sandstone formations jordanian history ancient civilization carvings geological features limestone natural beauty excavation cultural heritage sandstone architecture spirituality sacred sites archaeological site landscape natural wonders ancient art ruins history sightseeing preservation travel destination natural rock ancient structures