The Willis Tower, the moon and pink clouds make for a beautiful sunset in Chicago in 2011. The Willis Tower is bathed in clouds before a 2012 spring storm in Chicago. Willis Tower and the Chicago ...

plan on arriving 30 to 45 minutes before sunset to ensure you have enough time to get through the elevator line and up to the top. More than 1.7 million people make their way to Willis Tower's ...

The observation deck at Willis Tower. The Blackstone Group will buy Chicago's Willis Tower for $1.3 billion, the highest price ever paid for an American office tower outside of New York City.

As the massive renovation of Chicago’s Willis Tower continues, the famous skyscraper reopened its Wacker Drive lobby on Tuesday, revealing a new installation by artist Jacob Hashimoto.

CHICAGO (CBS)-- The Willis Tower on Tuesday lost the title of the tallest building in the United States to the new World Trade center in New York. Technically, the torch won't be passed until next ...