10. Seagram Building

The Seagram Building on Park Avenue had many revolutionary design features: curtain wall construction for the exterior and a big open plaza in front, heralding a flurry of similarly designed buildings in New York City (also taking advantage of height bonuses for public space). The famous Four Seasons Restaurant is inside and a Picasso tapestry was gingerly removed and now displayed at the New York Historical Society.

Next, check out these 10 unique and quirky subway entrances in NYC.