Don't Look Down!

The Sears Tower is offering a new way to push your fear of heights right over the Ledge. A glass ledge, actually, suspended from the building's 103rd floor Skydeck. "The Ledge" is the nickname given to a set of glass balconies that open to the public Thursday.

Sears Tower officials say the inspiration for the balconies came from the hundreds of forehead prints visitors left behind on Skydeck windows every week. The glass is slated to be three layers thick, and each layer will be a half-inch thick.

The balconies will be able to hold about five tons. Other changes are on the way for to the country's tallest building, including a name change to Willis Tower. And building officials recently announced a $350 million green renovation.