This puzzle recreates Chicago's The Windy City famous skyline not only in three dimensions using scale - model buildings, but also along the axis of fourth dimension time, spanning 100 years of its architectural history. 

The puzzle includes 127 plastic buildings that depict the city as it appeared as far back as 1873 through to 2015 Including icons such as the Willis Tower, John Hancock, Navy Pier, and the Chicago Spire.

Each buildings replica fits into pre-cut holes in a traditional 2D jigsaw puzzle composed of 831 pieces that form the city's street layout and islands. 

The streets glow in the dark, emphasizing the city's insomniac nickname. The product includes a poster that directs you through time as you rebuild the Chicago's skyline history. 

The online educational feature includes more than 2000 facts.

Assembled this puzzle measures 19" L x 19" W x 5" H.