Flying into LaGuardia Airport from the southwest takes you over a dozen cemeteries, providing an entirely different perspective on these green spaces. Here are four I saw from the right side of the plane. I discovered afterwards that I probably would have had a great view of Green-Wood off the left side of the plane.
You can see how full these cemeteries are. This article from the NY Times in 2010 discusses how all the major cemeteries in New York City are either completely full or rapidly approaching their capacity: City Cemeteries Face Gridlock.