Great Pyramids of Giza and Sphinx, Egypt. What a spectacular world wonder. One I highly recommend you see for yourself in person. I was and still am in awe of how the Egyptians were able to build these incredible structures. Beauty in the middle of a desert. They say don't go in the summer to avoid the high heat but I went in the middle of July and I felt it was not as hot as California during the summer! Of course, definitely cover your head and your body to protect you from the suns rays. And bring plenty of water.
Watch out for the camels! Or you'll end up like me, sideways, and the person who saves your life behind you is screaming in Arabic to stop before I fall off the camel! :)