The ancient city of Petra is located in Jordan. Renowned for its rock-cut architecture and water conduit system, Petra was the capital of the Nabataean Kingdom in the 4th century BCE. It served as a major trading hub and is famous for the iconic Al-Khazneh, or "The Treasury," which showcases intricate carvings in sandstone cliffs. Petra was rediscovered in the early 19th century and is now recognized as a UNESCO World Heritage site, attracting tourists and historians eager to explore its rich history and archaeological significance.