Experience one of the most impressive engineered wonders of the world! Built during the Depression; thousands of men and their families came to Black Canyon to tame the Colorado River. It took less than five years, in a harsh and barren land, to build the largest dam of its time. Now, years later, Hoover Dam still stands as a world-renowned structure. The Dam is a National Historic Landmark and has been rated by the American Society of Civil Engineers as one of America's Seven Modern Civil Engineering Wonders! Upon arriving at Hoover Dam, enjoy the Government Guided V.I.P. Discovery Tour. You will be able to access the Visitor's Center, Exhibit Areas, Movie Room, Observation Deck and the Generator Room.