Washington Square, Philadelphia

Washington Square, originally known as Congo Square, is one of William Penn's original five city squares. In colonial times, Black men and women were brought to this area before they were sold into bondage and transported to their new homes. The square later served as a burial ground for both American and British Revolutionary War soldiers and ironically, white and Black victims of the 1793 yellow fever epidemic were also buried together here. These days it's the location of the Tomb of the Unknown Soldier.