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.

Willis Tower and its Skydeck sit above South Wacker Drive on the western edge of the Loop. You'll find the Quincy/Wells L station nearby, as well as several bus stops and a parking garage.

Discover why this office tower is ... Muller told Chicago Inno at the time. The company signed on for 15,000 square feet at One East Wacker, taking up the entire 39th floor, AMTrust said.

Wednesday morning saw the world-famous observation tower receive its bi-annual cleaning. Representatives said the Needle's exterior glass floor is washed around twice a year. This gargantuan ...

The deal gives the company breathing room during its full-scale renovation of Chase Tower, the 56-year-old skyscraper at 10 South Dearborn Street that has been the firm’s Chicago HQ since 1969.