Around 2009-10 a friend of mine lived in a newer subdivision on the outskirts of Charlotte, NC that was built around 2003 or so. It was very HOA, and most of the houses had privacy fences including his, but from the second floor we could see what looked to be an old car back in the woods behind the fence. Sure enough there was a 1960s Chrysler car of some sort back there, I think it was an early Plymouth Valiant but can't remember for sure. It was wrecked, and at that point pinned in by trees. I guess the builder figured the fence would hide it, but you could definitely see it from the second floor, at least in winter. It was pretty far from any established roads, so it wasn't an undiscovered wreck or anything, just a wrecked car someone parked at the back of what used to be farm land.
On a similar note, in the late 1990s I remember in Chapel Hill, NC a developer started clearing land along Sage Rd for a new office park and townhouse development and there was a cluster of 1920s-1930s Ford cars back in the woods, probably about 7-8 of them. They were in really rough shape at that point, but it was an interesting thing to see a line of rusty 1930s cars parked along the side of the road in Chapel Hill. I'm sure this was also a park it at the back of the farm situation since there was little development there before the 1960s.