article_snippet: the 110-story building's Skydeck on the 103rd floor is a tourist attraction that allows people to look out into Chicago from all directions .
article_snippet: Today The building's Skydeck on the 103rd floor ranks tenth, according to The Skyscraper Center.
article_snippet: The glass cubes on The building's Skydeck on the 103rd floor extend out over the 110-story building.
article_snippet: The Willis Tower's Skydeck, located on the 103rd floor, is a popular tourist attraction.
article_snippet: The Skydeck officially opened to the public in 1974 and underwent a multimillion-dollar renovation in 2000.