Fallen gravestones in section I at Prospect Hill Cemetery in Washington, D.C., in the United States in 2014. Prospect Hill Cemetery was added to the Register of Historic Places of the District of Columbia (a listing of historic sites maintained by the city) in 2005. The cemetery lacks an endowment, and most of the lotholder families have died out. With only five or so burials occurring each year, the cemetery lacks income for maintenance and is in some disrepair.