My favorite building on the Upper West Side is 640 West End Avenue, at West 91st Street. It is my favorite because it stands out from a mile away. One side of the building is almost completely covered in ivy, which in my opinion gives it a very good, mesmerizing look. I mainly like it because it doesn't follow the standard look of buildings in the area, it has its own identity.
Because this building captured my attention, I did some research. here are some things I found interesting: The building was designed by the architecture firm Townsend, Steinle & Haskell in 1912. It has a three-story rusticated limestone base with the rest of the building being grey brick. The entrance does not have a canopy, but instead two polished granite columns and a broken pediment reveal on the second floor window above the entrance. And here's a fun fact - 640 West End Avenue was used in an episode of Seinfeld as the exterior of Mr. Pitt's apartment building.