Hoover Dam is a concrete arch-gravity dam in the Black Canyon of the Colorado River, on the border between the U.S. states of Nevada and Arizona. It was constructed between 1931 and 1936 during the Great Depression and was dedicated on September 30, 1935, by President Franklin D. Roosevelt. After I hot day I found free coke, great and cheap burgers and recovered from my losses in Vegas at Hoover Dam Lodge. Highly recommended for a rest after sightseeing.