entrance to the tomb of lihyan, son of kuza carved in rock in the desert, mada'in salih, hegra, saudi arabia

jabal kuza lihyan nabataean al hijr ula alula ancient antique arab arabia arabian arabic archeology architecture carved castle cave civilization culture desert east forgotten formation geology grave hegra history ksa landmark lonely madain middle monument nabatean rock ruins saleh sandstone saudi saudian site son stone temple tomb unesco