According to a local legend a witch once lived in what is now Truxton Park in Annapolis and/or was hanged in the area.
The legend also says she she is buried there.
This, of course, is widely believed to be untrue. The grave likely belongs to a Methodist, which might make the story close enough.
There does appear to be a small graveyard just on the outskirts of Truxton Park where one crypt appears to have survived. I had to do a little searching around to find it as all the sources on the internet only give vague directions. In case you want to visit it, here is the location on GPS is 38 57 44.03 n, 76 30 07.50 W.
Here are some pictures I took of the alleged witch's grave:
I did not do any digging around the site to find out more because I didn't have a shovel and that would be illegal.