Although much has been written about Petra, nothing quite prepares you for this magnificent ancient city of the Nabataeans or nomadic Arabs. Set on the eastern slope of the Arabah Valley, Petra is believed to have been settled in almost 11,000 years ago. Cut out of a sheer rock face, the city can be accessed through a narrow gorge which directly leads into one of the most elaborate temple structures called Al Khazneh or the Treasury. The Nabataeans, accustomed to surviving in barren landscapes, were skilled water harvesters and the water conduit system of Petra is a marvel in itself. With hundreds to beautifully carved temples and tombs, you could spend at least four or five days exploring Petra alone.