The John Hancock Center in Chicago has installed a new observation platform on the 94th floor, and it’s not for the faint-hearted.
Called TILT, the attraction uses hydraulic lifts to move the full-length windows forward at a 33-degree angle so people can get a proper bird's eye view of the city 1,000ft below.
The tilting windows have metal bars on each side, which you grab hold of as the glass begins to move outwards.
TILT opens to the public this weekend and will cost $5 plus the admission to the observatory.
The movement in and out of the building is very controlled. We want it to be memorable and thrilling, but we don't want to terrify anybody.