Fort Bunker Hill
Washington, D.C., United States · built 1861
Fort Bunker Hill was one of seven temporary earthwork forts of the Civil War Defenses of Washington, D.C., built in the Northeast quadrant of the city at the beginning of the Civil War by the Union Army to protect the city from the Confederate Army. From west to east, the forts were: Fort Slocum, Fort Totten, Fort Slemmer, Fort Bunker Hill, Fort Saratoga, Fort Thayer and Fort Lincoln. Unlike other forts, today very little remains of the structure.
Fort data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).