The definitive New York skyscraper. See it from the street; go up the Rock instead.
The Empire State Building is the 1931 Art Deco spire that still says 'New York' more than any other, 102 storeys, a glowing crown, and the deck King Kong climbed. It's an icon; whether to go up is the question.
Worth seeing from the street, but for the view, Top of the Rock puts the Empire State in your photo instead of under your feet.
The grounds are free; going inside or up is ticketed — book online ahead to skip the queue.
The building looks best from the street, and for the view from above, Top of the Rock (or the Edge, or Summit) beats it for one reason: those decks include the Empire State in the skyline, and from the Empire State you can't see the Empire State.