Out of all the photos I took at the 'Top of the Rock', some of them with breathtaking views, this is the one I think translates better the feeling of being up there. The sense of being high above the streets, above most buildings even, and the city lights stretching almost infinitely in all directions. 
Below us is the Fifth Avenue, where you can see St. Patrick's Cathedral, a Neo-Gothic church built in 1879 whose twin-spires measure 100m tall and seem tiny from up here. This was taken from the 69th floor, 256 meters from the ground (that's 840 feet in imperial), and I can't recommend enough going there when in NY. Even the elevator trip up there has been transformed into a ride.
Again using the fisheye lens, this time to give more of the impression of really being there, not to try and include more in the frame. This tiny lens has found a permanent place on my travel bag.

-- Gear
Fujifilm X-PRO1
Samyang 8mm f2.8 Fisheye
-- Post
Lightroom : Initial toning and final crop
Photoshop: Sharpening, colour blending and clean up
NikCollection Color Efex Pro 4: Toning and Detail extraction