9. Metropolitan Museum of Art Driveway

The famous steps on the plaza of the Metropolitan Museum of Art were added by architect Kevin Roche in about 1970. Previous to that, the museum front looked as it did in the photo above (which we think is from the 1930s). Richard Morris Hunt (and his son, who ultimately carried out the construction of the Great Hall wing) had originally designed a rather narrow set of steps leading from a vehicle drop-off, and sometime in the 20th century the “dog house”–a funny little vestibule which you see in the photo–was added to prevent drafts into the building. Roche removed both the dog house (replacing it with modern air-curtain technology) and the undersized original stairs, and added the large, sprawling exterior stair that exists today and is a landmark in its own right.