My favorite cemetery is in my hometown of Rochester, NY. Mount Hope Cemetery was the first municiple cemetery in the US, meaning reglardless of the Christian denomination or religion you belonged to, you could be buried there. The cemetery was established in 1838, and was built on a very hilly section of land right outside of the city. Now there's a major hospital right down the street, and generic urban sprawl all around, but the cemetery remains peaceful and unchanged. Like most cemeteries, Mount Hope has been the victim of vandals over the years, but all in all, the graves are in very good shape. The unusual lay of the land makes Mount Hope a lot of fun to explore...sometimes you'll find an old grave and feel like you're the first person who's seen it in years.
As far as I know, there are no ghosts or "black aggies" in Mount Hope, although the victims of various tragic accidents and wars are buried there. For example, the mass grave from the orphanage fire back in the late 1800's. The cemetery's two most famous "residents" are Fredrick Douglas, the escaped slave who became an abolitionist, and Susan B. Anthony, who fought for women's right to vote. It's one of my favorite places to walk around, especially in the fall.
Check out http://www.fomh.org/ for more info and pictures!