Man Power

 To build these incredible temples a pully system was established to raise the rocks to their places.  The 'u' shape in the rock was carved so that rope could be inserted and using a 'hamster wheel' human powered gadget, the rocks were raised into position. Take a close look at the stones at the top of the temple and you will see the 'u'.

You can see how big this is with Peter standing beside a broken 'u' stone.  In the last photo, I put my hand in a 'u' to give you an idea of its width.