Mostly hidden in the woods inside Prospect Park, this still-active Quaker burial ground, established in 1849, is older than the park itself, which was built around it beginning in 1866. The 10-acre cemetery contains over 2,000 graves marked with simple headstones like the ones you see above. It is generally off limits to the public, although tours are occasionally given. Even on those tours, however, the location of the grave of the cemetery's most famous resident, Montgomery Clift, is kept a secret.