Chicago is home to one of the tallest buildings in the world: the Willis Tower. So tall that on a windy day, the topmost floors can sway as much as three feet. But what keeps it from falling?

Occupying the 103rd floor – that's nine floors higher than 360 CHICAGO – of the 110-story Willis Tower (the third-tallest building in North America after One World Trade Center and Central ...

An curved arrow pointing right. The Ledge is a glass box on the 103rd floor of the Willis Tower, the eighth-tallest building in the world and the tallest building in the Western hemisphere.

At 110 stories, the Willis Tower bills itself as the fifth-tallest office building in the world (for a time, the Willis Tower also went as the Sears Tower). Blackstone Real Estate Partners VII ...

The Skydeck Chicago in the Willis Tower provides a thrilling ... Designed by Jeanne Gang, Aqua Tower is recognized as the ...

We find out why downtown became the go-to destination for Chicago’s tallest buildings ... or “we’re moving our headquarters into Willis Tower.” Businesses are also trying to attract ...

and Chicago's Willis Tower. A year before Burj Khalifa opened, he conquered Taiwan's Taipei 101, which was the world's tallest building from 2004 to 2010. The French Spider-Man was also arrested ...