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  Walking out for a view

Around the world, there are spectacular skywalks, bridges and other outlets that allow visitors to step out and get a good look at their surroundings.

A tourist stops to take a picture of the
A tourist stops to take a picture of the

A tourist stops to take a picture of the Lego rendering of Chicago's John Hancock Building and the Sears Tower while visiting the National Building Museum's exhibit "Lego Architecture: Towering Ambition" in Washington on August 10, 2010.

The Chicago skyline featuring the Sears
The Chicago skyline featuring the Sears

The Chicago skyline featuring the Sears Tower is seen from a helicopter 06 July 2006 in Chicago, Illinois. The tower, the tallest in North America was the tallest in the world until 1996. The tower is third behind the Petronas Towers in Malaysia. AFP PHOTO/TIM SLOAN