The view from atop the nation's tallest building is about to get even better.
In June the Sears Tower will open a glass-bottom sky deck as part of a multimillion dollar renovation of the building, the Chicago Sun-Times reports.
The new attraction, called The Ledge, will feature four feet of glass only an inch-and-a-half thick jutting out from the observation deck. Visitors will be able to see straight down to the city streets 103 stories below.
Each viewing enclosure can support about five tons, a tower executive told the Sun-Times, which is three more than the city requires.
The iconic building will officially become the Willis Tower later this summer.