For anyone thinking of visitng Petra, try and allow more than a couple of hours. When we went it was for two days, going in and out each day. A lot of people just go down the entry canyon, take a look at the Treasury (the bit in Indiana Jones) and head back. But the site itself is much larger. If you are up for a decent walk there are parts that I thought were much more impressive and interesting up the hills. Some of the scenary around there is stunning.
Also, if you can do down in the evening, that's great too.
Jordan as a whole was a really interesting place to visit.
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