601 West 26th Street
New York NY 10001
Haha because I never have! I am referring to the 2nd largest business building in NYC, The Starrett-Lehigh building located at 601 West 26th Street, Manhattan. This building use to have a train occupy the ground floor, it has 8 miles of windows surrounding it and still holds a lift to bring cars to the top floor(I hear Martha Stewart and Ralph Lauren use these). Completed in 1932, this building also holds many major fashion brands such as Marchesa, Calvin Klein, Hugo Boss, Club Monaco (just to name a few) and is the set for many cool events and music videos, even by Beyoncé too.
*Did you notice how the size of the building compares to the Empire State building?
Image and info from here.