Spring Break 2001, my freshman year of college, I went to Egypt with my dad. During the five days we were there, we saw most of the main, well-known sites which included the Pyramids at Giza, Saqqara, and Dahshur. We went in the Great Pyramid (Khufu’s), Menkaure’s pyramid, and also Sneferu’s pyramid (also known as the Red Pyramid).
Definitely worth doing, though I would say that if you ever get over there, you should see as much as you possibly can. The pyramids are awesome, but there are so many other things to see too!
If I ever manage to get back there, I’d love to be able to climb the Great Pyramid. It’s not allowed, but I’m sure there are exceptions to that :)