What are some epic abandoned or otherwise secluded places in NJ, NY or PA that I could use for my climactic scene?

I wrote the first draft of a fantasy novel set in modern times. Like early 2000’s. The problem is I want this particular novel to be strictly set around the NJ area. It’s so populated now that I’m having trouble finding a good place that’s abandoned that I could set the climactic final battle in without the public interfering. So I figured I’d widen my search to the surrounding states. The main characters are middle school kids so I can’t have them wander so far off or else it would create plot holes, which is why I’m limiting it to PA and NY other than NJ.

I’d preferably want a place that could be a hideout, and if possible have some dangerous heights, either on buildings like towers or natural hazards like cliffs.

Any places relating to urban legends or hauntings is a plus, since this novel deals with those things.