"III" . "Prince William Forest Park"@en . . . "Prince William Forest Park was established as Chopawamsic Recreational Demonstration Area in 1936 and is located in southeastern Prince William County, Virginia, adjacent to the Marine Corps Base Quantico. The park is the largest protected natural area in the Washington, D.C. metropolitan region at over 19,000 acres (7,700 ha)."@en . . . . "6.50896e+07"^^ . "379535"^^ . .