More than 1.7 million people make their way to Willis Tower's Skydeck Chicago each year, and it's easy to see why. Occupying the 103rd floor – that's nine floors higher than 360 CHICAGO – of ...

When New York City's One World Trade Center neared completion in 2013, Chicago architects highlighted the Willis Tower's enduring scale. "Willis Tower still is tallest in terms of how high you can ...