Madain Salih, Saudi Arabia
Mada'in Saleh, also called 
Al-Hijr or 
Hegra, is a pre-Islamic archaeological site located  in the  
Al-Ula sector, within the Al Madinah Region of Saudi Arabia. A majority of the vestiges date from the Nabatean kingdom.
The site constitutes the Kingdom's southernmost and largest settlement after Petra, its capital. traces of Lihyanite and  Roman occupation before and after the Nabatean rule, respectively, can also be found. The Qur'an places settlement of the area by the Thamud people ofter Noah but before Moses, which can be  interpreted as the 3rd millennium BC.