Lake Anna

Lake Anna is one of the largest freshwater inland reservoirs in Virginia, covering an area of 13,000 acres, and located 72 miles south of Washington, D.C., in Louisa and Spotsylvania counties. The lake is easily accessible from Fredericksburg, Richmond, Charlottesville, Northern Virginia, and Washington, D.C., and is one of the most popular recreational lakes in the state.

Source: Wikipedia