Petra is regarded as one of the architectural wonders of our world. Carved into the cliffs of a deep desert gorge, this ancient city was once the power centre for the Nabataeans, who dominated the Arabian silk and spice routes from this hidden outpost until it was conquered by the Romans. Entrance to the city is through the Siq, a narrow gorge, over 1km in length, which is flanked on either side by soaring, 80m high cliffs. Just walking through the Siq is an experience in itself.
Then you emerge from this narrow passage to behold of Al-Khazneh (the Treasury). This structure is carved straight into the rockface and stands almost 45m high.
Petra is a UNESCO World Heritage site and was recently voted one of the New Seven Wonders of the World. The Treasury is the most photographed part of Petra, but further exploration can reap great rewards, such as the Monastry.