The world's largest dam is located in China

The Three Gorges Project, with 25,000 workers and a budget of $24 billion, is China's most ambitious engineering undertaking since the Great Wall. It has replaced Brazil's Itaipu Dam as the world's largest hydroelectric and flood-control installation, Chinese officials said, with the strength to hold back more water than Lake Superior and power 26 generators to churn out 85 billion kilowatt-hours of electricity a year when the final touches are completed in 2008. Hoover Dam on the Nevada-Arizona border, by comparison, generates more than 4 billion kilowatt-hours a year.

"This is the grandest project the Chinese people have undertaken in thousands of years," said Li Yong'an, general manager of the government's Three Gorges corporation, which runs the project under the direct leadership of Premier Wen Jiabao.