One of the main attractions of Jordan is Petra. Between 400 B.C. and A.D. 106 Petra was the capital of the Nabataean empire. This thriving city was a center for trade. Its buildings were carved out of the rock faces. How? They had no tools other than stones. But they possibly used ropes to suspend builders from the top of the rock faces. The designs of the buildings are amazingly accurate and symmetrical and include pillars and intricate  details.