2. 767 Third Avenue

767 Third Avenue was unusual for its era, not just for the wall holding up the world’s largest chessboard, but the use of wood and and brick as construction materials rather than the more popular glass and steel. The curves of the walkway counteract the grid system. In the same plaza, there’s also a vintage stagecoach and a 1929 Ford truck. More information on the chessboard and other easter eggs are here.