For a brief history of Watchtower cemeteries
http://truthhistory.blogspot.ca/2015/02/find-grave.html
...the Society had its own burial ground at the Rosemont United Cemeteries in Ross Township, Pittsburgh. Here CTR and a few Bethel family members and Pilgrims were buried, and their names inscribed on a pyramid monument...
...shortly after the headquarters moved from Pittsburgh to Brooklyn for the second time in 1919, this cemetery was to all intents and purposes abandoned...
To replace the Pittsburgh plot, a new cemetery was created on Staten Island, New York. In 1922 the Society bought 24 acres of land in Woodrow Road, Staten Island. The area is sometimes known as Rossville and also Huguenot Park. The purpose was to build their own radio station WBBR which started broadcasting in early 1924. There was also some farming done on the land, in what was then very much a rural area.
A new graveyard was established nearby in the same street, alongside an historic landmark, the Woodrow United Methodist Church.......This small burial plot was used until at least the late 1960s....
The Woodrow Road graveyard was accessible to the general public. It was obviously the policy to have no grave markers. It is reported that today you can recognise the area belonging to the Society simply because it is the only section in the cemetery without headstones.
In the 1960s the Society purchased two properties at Wallkill, Ulster County, about 100 miles north of Brooklyn, NY, totalling a reported 1200 hectares (around 3000 acres). These became known as Watchtower Farms, and extensive printing operations were transferred to this area from the early 1970s onwards. A new graveyard was created on this property that is known as the Watchtower Farms Cemetery. It is a private cemetery on private land and is therefore not accessible to the general public.