Petra

Petra (Arabic: البتراء, Al-Batrāʾ; Ancient Greek: Πέτρα), originally known as Raqmu (Nabataean Arabic: الرقيم), is a historical and archaeological city in southern Jordan. Petra lies on the slope of Jabal Al-Madbah in a basin among the mountains which form the eastern flank of Arabah valley that run from the Dead Sea to the Gulf of Aqaba. It was established possibly as early as the 4th century BC as the capital city of the Nabataean Kingdom. The Nabataeans were nomadic Arabs who invested in Petra's proximity to the trade routes by establishing it as a major regional trading hub.

• http://en.wikipedia.org/wiki/Petra
• http://www.visalialifestyle.com/petra-jordan-a-desert-masterpiece/