1. Hoover Dam is a concrete arch-gravity dam that is located in the Black Canyon of the Colorado River, on the border between the states of Arizona and Nevada, near Las Vegas. It was built during the Great Depression between 1931 and 1936, and it was once the tallest dam in the world. The construction of the Hoover Dam created Lake Mead, which is the largest reservoir in the United States in terms of water capacity. The Hoover Dam is an important source of hydroelectric power and water for the southwestern United States.

2. The Hoover Dam is open daily from 9:00 AM to 5:00 PM, except for Thanksgiving and Christmas Day. The phone number for the Hoover Dam Visitor Center is (702) 494-2517.

3. Admission to the Hoover Dam Visitor Center is $15.00 per person for adults, $12.00 for seniors, and $10.00 for children ages 4-16. Parking is an additional $10.00 per vehicle. Tours of the Hoover Dam and power plant are available for an additional fee.

Transportation to the Hoover Dam is available from Las Vegas by bus, car, or helicopter. The drive from Las Vegas to the Hoover Dam takes about 30-45 minutes. There is also a shuttle service available from the Las Vegas Strip, which includes transportation to and from the Hoover Dam, as well as admission to the Visitor Center.