Thanks for the response. Sorry, I guess I could've supplied the neighborhood. It's Oakwood Village in Flanders, NJ. There are quite a few of them in the neighborhood, but no caches nearby. I guess they could be designating businesses being run out of people's apartments, but why would those show up on the map? There's another one just across Rt 206 that is possibly near a cement structure, but there's no actual house there.