Acrophobia is the fear of heights.
So in treating an acrophobe, a psychiatrist takes the patient to the second floor of a building and makes them look out the window, thus exposing them to their fear. Once their fear of the second floor is gone, the patient is slowly moved up floor by floor, each time waiting for their fear to disappear. At the University of Michigan Department of Psychiatry, such exposure treatments are performed in the East elevator area of the main hospital. The hospital is nine stories tall, providing a sufficiently strong anxiety-provoking stimulus for most patients. The East Elevator site is shown here on this map of the UM Medical Center area.