While exploring the southern, lesser-known part of the Jordanian desert Wadi Rum, I notice a remarkable, palace-like structure sitting on a high, rocky cliff. The view reminded me of a scene from the classic Oscar-winning film Lawrence of Arabia. It just lacked camel caravans and people. Who lived in such a place and why did they decide to abandon it? Perhaps the abandoned structure was the set for a film I was unfamiliar with. The harsh background recalls those against…