10. Petra

Built around 1200BC, Petra is Associate in Nursing ancient town of Jordan, far-famed not only for the very fact that it’s entirely engineered within “towering rocks,” except for its intricacies in this. the town was ready to created within the desert as a result of its designers, the Nabataeans, redirected waterways, making a synthetic oasis—the center of their caravan trade, and a defence.