An Arab nomadic tribe known as the Nabateans built Petra, which became the ancient capital of the Nabatean kingdom from 9 B.C. to A.D. 40. Just last year, National Geographic named Petra as one of the "New Seven Wonders of the World." What took them so long?
http://deseretnews.com/article/1,5143,700261413,00.html?pg=1
