Jabal Al Ahmar, Ula, Saudi Arabia

Hegra (Ancient Greek: Ἕγρα), known to Muslims as Al-Hijr (Arabic: ٱلْحِجْر), also known as Mada’in Salih[4] (Arabic: مَدَائِن صَالِح, romanized: madāʼin Ṣāliḥ, lit. 'Cities of Salih'), is an archaeological site located in the area of Al-'Ula within Medina Province in the Hejaz region, Saudi Arabia. A majority of the remains date from the Nabataean Kingdom (1st century AD). The site constitutes the kingdom's southernmost and second largest city after Petra (now in Jordan), its capital city. Traces of Lihyanite and Roman occupation before and after the Nabatean rule, respectively, can also be found.... In 2008, UNESCO proclaimed Mada'in Salih as a site of patrimony, becoming Saudi Arabia's first World Heritage Site. Among Hegra’s outcrops is Jabal AlAhmar, a name referring to the red hue of the rock. This location has 18 tombs, of which, a few were recently excavated.