Most people when they hear of Petra will probably think of the Indiana Jones movie where the final scenes take place inside a large building cut into the rock. And the building in question is actually the first one that you encounter entering Petra. It’s called the Treasure Chamber, a misleading name since it’s actually a tomb.
But before you get that far there is quite some way to walk. The road winds down through a narrow and steadily deepening ravine called “Siq”. It’s easy to understand how secret and difficult to invade the city must have been.