3 Best Day Trips from Las Vegas | Condé Nast Traveler

"Seeing Hoover Dam and getting a good tour of the place is crucial to understanding the point in American history when it was built. The 726-foot-high concrete arch gravity dam is one of the most recognizable and iconic manmade structures in the world. Try the Dam tour, which is a one-hour guided tour of the powerplant and its passageways, which starts with a film about the development of the dam, and includes an elevator ride to the Nevada wing of the plant and eight of the dam's generators, as well as into the tunnels that served as inspection areas.  It's a great place for kids, but it's also good for anyone who wants to see what has been made possible by human imagination and engineering." - Andrea Bennett