The ancient city of Petra is located in Jordan. This archaeological marvel, carved into red sandstone cliffs, served as the capital of the Nabataean Kingdom around the 4th century BCE. Known for its stunning rock-cut architecture and water conduit system, Petra was a thriving trading hub, connecting various caravan routes. The most iconic structure is Al-Khazneh, or "The Treasury," which showcases intricate facades blending Greco-Roman influences with Eastern styles. Rediscovered in the early 19th century, Petra has since become a UNESCO World Heritage Site and is recognized for its historical and cultural significance, drawing countless tourists each year.