This little pump house has intrigued me since I was a kid in the 1950s. Apparently it once provided water for Oak Grove Cemetery, but it's been a decrepit oddity for all of my life. As kids we were always a little afraid to go inside – OK, I admit that I'm still hesitant – but don't worry, you don't have to enter the place to find the cache.
Find the Cornelius mausoleum, then keeping walking over the edge of the cemetery.
It's an interesting area with a large floodplain to the south and evidence of beavers to the north along the creek.