111 Eighth Avenue, the former Port Authority building, houses Google's NYC operations in a nearly 3 million square feet building. The structure is so big, that it has elevators large enough to accommodate 18-wheel semi-trucks and a helicopter landing pad on the roof.
http://en.wikipedia.org/wiki/111_Eighth_Avenue
http://www.nytimes.com/2013/03/16/business/at-google-a-place-to-work-and-play.html
http://www.popularmechanics.com/technology/engineering/infrastructure/where-does-the-internet-actually-live-2#slide-5