CHICAGO -- Video posted to social media showed cracks on the glass floor of The Ledge attraction at Willis Tower (formerly known as the Sears Tower) on Monday. The video was posted by a Skydeck ...

FILE - In this June 24, 2009, file photo Anna Kane, 5, looks down from "The Ledge," at Chicago's 110 story, 1,450 foot Willis Tower. The glass balcony is suspended 1,353 feet in the air and juts out 4 ...

Standing on top of the world is a great feeling, whether you are 4 or 40. Don't miss the Willis Tower's new Skydeck. Standing on top of the world is a great feeling, whether you are 4 or 40. The ...

CHICAGO, Illinois -- With no visitors at the Willis Tower Skydeck right now, some baby chicks took the opportunity to enjoy the view. They ventured out onto the clear observation boxes on the 103rd ...

CHICAGO — It was once the world’s tallest building, and it continues to be the king of Chicago’s skyline. Now, the Willis (Sears) Tower is celebrating a monumental birthday in a big way. The Skydeck ...

The Sears Tower was the world’s tallest building until 1996, when it was surpassed by the Petronas Twin Towers in Kuala Lumpur, Malaysia. With clear weather, four states are viewable up to 50 miles ...