the 91st floor is an outdoor observatory. the outdoor observatory is accessible by stairs from the 89th floor. from the outside, it's possible to view the spire at the 508-meter-high apex, but tourists need to be careful of the strong winds. inside the building, on the 91f, is a small theater showcasing films about the building and the annual new year fireworks display. the 91st floor is only open on days with good weather conditions.