We love coming across old abandoned structures. Even though there's not much to this one it's still pretty cool. This appears to be an old abandoned old cistern (water reservoir) that has long since been in use. There is room for SWAG or trackables and please place back as found, as there are signs of local muggles that may hang around the area from time to time.
There's parking at the end of Belhaven Ave. and easy access to make the short hike over to GZ. And even though you are right behind a neighborhood of homes, you are visiting an area that has critters living here, so please be mindful of them and whenever possible CITO.