In this tiny wooded area beside the Belt Parkway sits a collection of perhaps a dozen shopping carts containing various items: clothing, folding chairs, plastic bags. This seems to indicate that someone is living here, or at least was in the fairly recent past. A Street View image from January 2013 shows what could very well be the same little encampment.
In the background of this shot, you can see a ghostly-looking A train heading south toward the Rockaways. Here's a closer look at the whole scene.
Day 1213
A life’s belongings?
April 26th, 2015
After viewing the close up, it looks to me like the shopping carts form the outer barriers of a fort, not unlike the forts we made as kids with sofa cushions and blankets. Probably a long-term habitation.