On the slope of Jabal al-Madhbah, in the Valley of Moses (Wadi Musa), lies the ancient city of Petra. When Nabataeans took over the city from Edomites and made it into the capital of their kingdom, the city gained status as it stood at one of the most important trade routes in Arabia. Caravans passed through Petra, carrying spices and textiles from Arabia to Syria, allowing the city to collect taxes from traders. The Nabataeans also developed their own extraordinary water system, which enabled the city to flourish even during prolonged periods of drought. Petra continued to prosper after Romans took over and eventually declined due to the change in trade routes. The earthquakes that devastated the whole area also brought the Rose City to ruin. It was not until 1812 that Petra was revealed to the Western World. Since then, the site has not lost its spotlight and historical importance as it became a UNESCO World Heritage Site in 1985. It is also the most visited tourist attraction in Jordan. This is a must-visit site if you happen to be in Jordan!