The World's 20 Most Amazing Dams (PHOTOS)

Terrell Johnson | TWC
Published: January 24, 2013

Marvels of Engineering, Massive Impacts

Wikimedia Commons

A 505-ft.-by-255.-ft. American flag hangs from the downstream face of Hoover Dam, near Boulder City, Nev. Built between 1931 and 1936, the dam today attracts roughly a million tourists every year.

With massive walls that often reach hundreds of feet high and hold in place trillions of gallons of water, dams are among the largest structures ever built by man. 

Throughout history, the truly big dams – those like Nevada's Hoover Dam and Brazil's Itaipu Dam – have helped to control floods, provided water for drinking and irrigating crops, and generated electricity for millions of people. Since the time of the ancient Egyptians, they've played a key role in building the modern world we know today.

We took a look at some of the most awe-inspiring dams all over the world, starting with Arizona's Glen Canyon Dam.

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