
In this photograph made on Thursday, May 10, 2012, a foreign tourist visits the Abu Lawha, the largest Nabataean tomb at the desert archaeological site of Madain Saleh, in Al Ula city, 1043 km (648 miles) northwest of the capital Riyadh, Saudi Arabia. Madain Saleh, also known as Al-Hijr, which was added on July 6, 2008 to UNESCO's World Heritage List. Madain Saleh, the largest conserved site of the civilization of the Nabataeans south of Petra in Jordan, Madain Saleh is the first World Heritage site in Saudi Arabia. (AP Photo/Hassan Ammar)