What are come cool things to do when visiting NYC?

i'm going to NYC in feb with a friend, and so far, we're planning on going to Ground Zero, and the Statue of Liberty. I want to see something fun, and modern...and i'm on tight budget....any ideas?What are come cool things to do when visiting NYC?
Hey :)

I have lived in NYC since I was little. Manhattan is the more expensive part of NY but they have lots to see and do. There is the Museum of Natural History, Museum of Modern Art, Central Park, The Wax Museum. In the Bronx, there is the Bronx Zoo :P Brooklyn has Prospect Park where they have all sorts of things. Horseback riding. Aquarium. Zoo.



All sorts of fun stuff.What are come cool things to do when visiting NYC?
You can see a lot with tours and not spend so much money.. try this site, the bus tours are cool http://www.citysightsny.com/