Take a tour of Hoover Dam in United States -- part of the World's Greatest Attractions travel video series by GeoBeats.

Hundreds of miles of the Colorado river indicate the presence of this major American landmark.

Besides its effects on the surrounding land, it has been a boon to the national economy.

It is one of the most famous dams in the world: the Hoover Dam.

Named after President Herbert Hoover, who supported the project, the dam was finished in 1936.

At the time, it was an enormous public work, the biggest dam in the world.

The Hoover Dam generates 4.2 billion kilowatt hours annually, enough power for 8 million people.

Besides electricity, the dam also generates over one million visitors to the site each year.