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 ...

In renderings, the revamped tower looks like a big guy cut off at the ankles. Designed by Chicago architects Skidmore, Owings & Merrill, Willis’s design was based on a structural innovation ...