I don’t know if this is general knowledge or anything, but I’m sure it’ll help someone out.

www.skatespotter.com
Cool little site where you type in your city and find spots to skate at, it’s a skateboarder site, but I suppose it’ll do…for now.
I think this site even works outside of the U.S.(finding UK spots…and beyond!).

www.quartersnacks.com
Another skateboarder site. It’s got spots in New York/ Jersey specifically with pics, and reviews, based on how skateable the spot is (by skateboard standards but w.e. wheels are wheels) and your chances of getting kicked out by security and when it’s best to skate there to reduce those chances. Shway.

This is all I could find on an empty stomach, if you want me to find you more, you better get to making me some delicious chicken sandwiches.

Seriously.