Entrance to Arlington National Cemetery

Arlington National Cemetery, in Arlington, Virginia, is a military cemetery in the United States, Arlington National Cemetery, in Arlington, Virginia, is a military cemetery in the United States, established during the American Civil War on the grounds of Arlington House, formerly the estate of the family of Robert E. Lee's wife Mary Anna Custis Lee, a descendant of Martha Washington. The cemetery is situated directly across the Potomac River from Washington, D.C..