No trip to Vegas is complete without a tour of the Hoover Dam, located just 30 minutes outside of Las Vegas. If you prefer to book your tour directly from the source instead of through an outside tour company, you can do so in person at the Visitor Center. Visit the historic railroad tour tunnels, take a ride on the original elevator to the top of the dam, and view the beautiful Colorado River through the inspection ventilation shaft. You can also take a guided tour of the on-site power plant, check out the exhibits at the Visitor Center, and visit the viewing platform, which overlooks a 30-foot diameter penstock. You may even be able to feel the vibration as water rushes through the floodgates beneath your feet.