I've been living in Manhattan for the past 2 years, and I'm finally ready to explore a bit more of the greater NY area. I'm interested in visiting Long Island, mostly because I've never been there and I don't know anything about it! Anyone have any advice on sights to see/photo?

I was considering Stonybrook, though a friend told me it would be difficult without a car, which I don't have since I'm a student in NY . This limits me to areas easily accessed with public transportation, and navigable by foot.

Any advice on areas that are interesting to you?