All four boxes of The Ledge, the glass enclosures on the 103rd floor of Chicago’s Willis Tower, were closed Thursday morning after cracks appeared on one of the box’s glass floors, NBC Chicago reports.
The popular tourist attraction is meant to give people a 360-degree unobstructed view of Chicago. The protective glass floor provides a fear-inducing look from a very high level. The glass can hold heavy weights without the worry of cracking, and visitors often test this fact by jumping.
However, NBC Chicago reports that a group of tourists who were standing on one of the enclosures that protrudes out of the west side of the building Wednesday evening noticed cracking coming from the floor beneath their feet.
A spokesperson for the Tower said the crack the tourists noticed was actually the coating on the glass floor.
It’s unclear what prompted the coating to crack, but according to the Chicago Sun-Times, the protective coating did what it was supposed to do. A spokesperson for the Tower said the coating is designed to prevent scratches on the glass and that cracks do not compromise the structure’s integrity. No one was in danger of falling, the spokesperson added.
Try saying that to the visitors who were standing on the Ledge looking straight down from 1,353 feet as the floor seems to be breaking.