When it is finally completed, China's Three Gorges Dam will tower 607 feet in the air and weigh more than forty Great Pyramids. Other than China's Great Wall, it will be the only man-made object visible from the moon. Supporters of the dam see the structure as key to a new China, controlling floods and bringing hydroelectric power to one of the country's least-developed areas, while critics voice a litany of concerns, including potential environmental issues, such as possible flooding of the spectacular area for which the dam is named. From ancient flood control to current controversies, The History Channel traces the captivating story behind the Three Gorges Dam.
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