The title is a throwback to 80s Christian rock, as well as a pun considering the terrain. It's also a fitting title because the place is just amazingly cool. If you've seen Indiana Jones it should look familiar.
Petra was the capital of the Nabataean Kingdom. To get to the place called the treasury ( the place you would recognize from Indiana Jones ) you walk through this amazing natural rock alley ( like in the picture above ).
From the treasury you go further into the ruins. If you don't want to walk one of your other options is camel.
This was definitely an amazing place to visit!
Ps - I was going to post some pictures from further in the park and realized that all I have are iphone pictures available for now.