Washington DC USA 4D Puzzle This Washington DC, USA puzzle recreates Washington DC s historic skyline, not only in three dimensions using scale-model buildings, but also along the fourth dimension time. The puzzle includes 57 replica buildings that depict the city as it appeared as far back as 1792 through to the present day - Over 200 years of architectural history. The puzzle includes iconic structures such as the Washington Monument, The Pentagon, Jefferson Memorial, Lincoln Memorial, The White House, and US Capitol. The buildings fit into pre-cut holes in a traditional 2D jigsaw puzzle composed of 1,076 pieces that form the city s street layout and islands. The product includes a Time Poster that directs you through time as you rebuild Washington DC s history. 1100 pieces, Ages 14 and up. Assembled measures 26-inches long x 15-inches wide x 3 1/2-inches tall.