I actually saw an episode of Globe Trekker last weekend where they visited these. Amazingly because they were going to flood the area with a lake from the construction of a new dam, it would have submerged these statues and temple completely. The statues are 65 feet tall. So they actually took the thing apart block by block and built an artificial mountain some ways away and rebuilt it there.
The Wikipedia page for it explains it.
http://en.wikipedia.org/wiki/Temple_of_Ramses
Incredible! Really beautiful. God I wish American cities had torn out more pages from European ones. That kind of structure would be perfect in Texas during the summer.