Rebuild "The Windy City's" skyline in three dimensions using scale-model buildings, while adding a fourth dimension... time. Puzzle includes 127 building replicas that depict the city as it appeared as far back as 1873 through to 2015, including iconic structures such as the Willis Tower, John Hancock Center, Navy Pier, and the Chicago Spire. Includes a Time Poster that directs you through time as you rebuild Chicago's skyline history.