I've heard this park be referred to as the "hidden park" and, in fact, you may live in town and not even know about it unless you leave in the surrounding neighborhood. This is a bit of an experiement and I'm not sure if it'll hold up overtime. I've found similar caches to this in the past, but none exactly like it, though I'm sure they're out there.
FTF goes to MNBorris
Difficulty rating has been increased a little after some comments from other Cachers.