It was recommended to me to check out Hoover Dam while in Vegas. I'm so glad I did!
I was on a speed vacation so I rented a car in Vegas and drove down to the Hoover Dam. It's 35 miles from Vegas so not bad. $10 to park in the garage. Worth it! Heads up, it was late August when I went and around 12pm. It was so hot!!!! Bring plenty of water and be prepared to sweat if you are coming in the summer.
Since I was short on time I did not go to the visitor center or take the Power Plant tour. I walked around and took lots of pictures. I saw people on a bridge, but ran out of time to drive over there. I did notice a sign on the drive up to the garage to see the overlook over Lake Mead. I stopped in and it was amazing!
Wish I had more time to explore, but I enjoyed what I saw. Definitely can see why people come here from all over.