The glass boxes known as the Ledge in Chicago’s former Sears Tower (now known as Willis Tower) jut out from the 103rd floor for an exhilarating view. (Richard Derk / Los Angeles Times)
Visitors anxiously take in the view from the Ledge. The experience is definitely not for those who are afraid of heights. (Richard Derk / Los Angeles Times)
Each box is made up of very clear glass three layers laminated together, for strength. (Richard Derk / Los Angeles Times)
The Ledge is included in the price of a ticket to the towers viewing deck. (Richard Derk / Los Angeles Times)
The tower lobby expresses Chicagos desire to host the 2016 games. The city will find out Oct. 2. (Richard Derk / Los Angeles Times)
