Petra is a UNESCO world heritage site, and one of the modern day seven wonders of the world.
The Monastery (Ad Deir) is one of the legendary monuments of Petra. Similar in design to the Treasury, but far bigger (50m wide and 45m high), it was built in the 3rd century BCE as a Nabataean tomb. It derives its name from the crosses carved on the inside walls, suggestive of its use as a church in Byzantine times.
The Monastery is located high in the hills northwest of the Petra city center. The ancient rock-cut path of more than 800 steps starts from the Basin Restaurant and follows the old processional route. (Wikipedia)
