We are heading back towards Las Vegas now, and on the way back we stop at the south rim of the Grand Canyon to camp and to take in a little bit of scenery.
Our last stop before heading back to Las Vegas (and then home) was a 'hard-hat' tour of the Hoover Dam. It was quite detailed, and took us right into the heart of the dam. Well worth it (although I'm not sure if you can take this tour post-9/11....)