Located just a short drive from Las Vegas, Nevada, Hoover Dam is one of the busiest attractions in the Southwest. Completed between 1931 and 1938, this concrete gravity-arch dam was one of the largest in the world at the time. It is 726.4 ft (221.4 m) high and 1,244 ft (379 m) in length. The roadways, parking structures and visitors' center give the whole area an unreal aspect. If I didn't know better, I might think this was a computer generated set for a movie. The Dam is famous for its part in the one of the latest Transformers movies. This panorama was taken looking upstream from the parking structure on the Nevada side. One interesting feature is that the state line between Arizona and Nevada runs down the approximate middle of the Dam, making a one hour time difference during Daylight Savings Time.