OK, so NYC doesn't have any real peaks to speak of, but perhaps there's a different way to fulfill your lofty ambitions in this concrete jungle. Look no further than the NYC Observation Deck Challenge, featuring the 5 most iconic observation decks in the city. All 5 lie in Manhattan and are open to the public (tickets required). Be a tourist or a local, viewing New York City from these insanely high decks is an unforgettable experience. Bonus points if manage to walk/run up any of the stairs instead of taking the elevator.