Seven Man-Made Wonders of the US
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Mount Rushmore, in the Black Hills of South Dakota, welcomes more than 2.6 million visitors per year.
John Roebling designed the Brooklyn Bridge hoping it would be perceived as a great work of art. It now is.
It doesn't matter where in the world people come from, one glimpse of this and they know they're in Washington, DC.
Golden Gate Bridge
The Golden Gate Bridge is the first non-building structure to receive the "Distinguished Building Award."
Seattle's 605-foot-tall Space Needle is designed to withstand winds of up to 200 miles per hour.
Empire State Building
Built during the Great Depression, New York City's Empire State Building is a work of determination and pride.
It took 5 years to complete the mammoth Hoover Dam on the Nevada-Arizona border.