Named one of the Top 10 Construction Achievements of the 20th Century, Hoover Dam continues to draw crowds more than 70 years after its creation. Attracting more than a million visitors a year, Hoover Dam is located in Black Canyon, just minutes outside of Las Vegas. In 1930, construction began on the Hoover Dam, the largest of its kind at the time. Despite the remote location and harsh working conditions, it was completed in less than five years — two years ahead of schedule — and well under budget. The dam is named after America’s 31st president, Herbert Hoover, and is a National Historic Landmark.