Mada'in Saleh Arabic also called Al-Hijr ("rocky place"), is an ancient city located in northern Hejaz (modern day Saudi Arabia), around 22 km from the red-cliffed wadi town of Al-`Ula.
In ancient times the city was inhabited by Thamudis and Nabateans and was known as Hegra.
Tombs with decorated facades dating from the 1st century BC to the 1st century AD.
The site also features some 50 inscriptions of the pre-Nabataean period and some cave drawings.
Al-Hijr bears a unique testimony to Nabataean civilization.
With its 111 monumental tombs, 94 of which are decorated, and water wells, the site is an outstanding example of the Nabataeansí architectural accomplishment and hydraulic expertise.