Wednesday, June 30, 2010

Man-Made Marvels: The Ledge at Willis Tower

Our world is full of wonders great and small, ancient and contemporary, natural and man-made. Here are 15 modern marvels that fill us with awe through the sheer scale, beauty, backbreaking effort and inspiration that brought them into creation.

Not afraid of heights? Check out the view from the Ledge at Willis Tower, formerly Sears Tower, in Chicago. The five-sided balconies, which opened in 2009, are suspended 1,353 feet in the air and jut out 4 feet from the building's 103rd floor Skydeck. They're actually more like boxes than balconies, with transparent walls, floor and ceiling. Visitors can see unobstructed views of Chicago from the building's west side, and a heart-stopping vista of the street and Chicago River below — if they're brave enough to look straight down.

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