Madain Saleh, also known as Al-Hijr, is an ancient archaeological site located in northwestern Saudi Arabia. It was the first UNESCO World Heritage Site in the country, recognized for its well-preserved rock-cut tombs and monumental architecture. The site dates back to the Nabataean civilization, which thrived from the 1st century BC to the 1st century AD. The site features over 130 tombs, many adorned with intricate carvings and inscriptions. Madain Saleh served as a vital trading hub along the incense route, connecting the Arabian Peninsula with the Mediterranean. Today, it attracts tourists and researchers interested in its historical and cultural significance.