We took a side trip from the Grand Canyon to Hoover Dam before heading to our final destination at 29 Palms, CA. We were going to take the dam tour, but after waiting in line to buy the dam tour tickets, we were told that the dam elevator was broken so we couldn't take the dam tour. We didn't feel like paying the admission fee just to tour the dam visitor center so we just went to the dam gift shop and then went on our way.
For some reason I have this pic from driving across the top of the damn dam:
The new bypass bridge is pretty cool, but the side barriers are so high, you can't see jack squat while driving across it, but its a pretty good view if you park and walk across it.