Castle Pinckney
Charleston, United States
Castle Pinckney is a small masonry fortification constructed by the United States government, in the harbor of Charleston, South Carolina, in 1810. It was used very briefly as a prisoner-of-war camp (six weeks) and artillery position during the American Civil War. It was named to the National Register of Historic Places in 1970.
Fort data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).