Madain Saleh, Saudi Arabia. ancient archaeological site located in northwestern Saudi Arabia. Madain Saleh, also known as Al-Hijr or Hegra, is an ancient archaeological site located in northwestern Saudi Arabia. It is renowned for its well-preserved tombs carved into sandstone cliffs by the Nabataeans, the same civilization that built Petra in Jordan. Dating back to the 1st century AD, Madain Saleh served as a crucial trading hub along the incense route. Some key aspects of Madain Saleh include: 1. Nabataean Tombs The site has over 100 monumental tombs, many with detailed façades carved into the rock. These tombs display a blend of Nabataean and Greco-Roman architectural influences. 2. Significance It was the first UNESCO World Heritage site in Saudi Arabia, recognized for its historical, cultural, and architectural importance. 3. Location It is situated in the Al-Ula region, about 300 km north of Medina, surrounded by striking desert landscapes. The site is now a major tourist attraction and part of Saudi Arabia's efforts to promote its cultural heritage to the world.