It is best to arrive in the morning when the sunlight brightens the Treasury and you can see the ornate detail shine. Many people turn back at this point, making the mistake of thinking that they have seen it all. Although the Treasury is the most impressive feature, there is far more to Petra than meets the eye. Further down the path among more tombs and caves was a large theater, similar to the one I saw in Amman, that seated 8500 people. It was here people would gather for important events, meetings and religious ceremonies. Every time I turned around, I was blown away by the scene laid out before me. I recommend staying for 2 or 3 nights in this area. Besides the day exploring Petra, there are other sites in the area to visit such as Aaron?s tomb and Little Petra. On Monday, Wednesday and Thursdays you can go back at night for a second visit to view Petra in candlelight.