sentence: Tourists can experience how the building sways on a windy day.
sentences_before: The Sears Tower observation deck, called the Skydeck, opened on June 22, 1974. It is located on the 103rd floor of the tower.
sentences_after: They can see far over the plains of Illinois and across Lake Michigan to Indiana, Michigan and Wisconsin on a clear day. Elevators take tourists to the top in about 60 seconds. This allows tourists to feel the pressure change as they rise up.
concept_name: tourist
headings: Willis Tower The Skydeck
categories: Skyscrapers in Chicago History of Chicago