We bought tickets for the Petra by night show, and while it was good, we felt it was a bit expensive for what it was.
The martian landscapes of Wadi Rum were equally as good.
We had two full days there and it was such an extraordinary site to look around.
And I'm pretty sure there were about 5 "Best view in the world" :) Although all of them could make a pretty good claim to the title, it's a stunning area.