Verne Citadel
Portland, United Kingdom · built 1857
Verne Citadel is a 19th-century citadel on the Isle of Portland, Dorset, England. Located on the highest point of Portland, Verne Hill, it sits in a commanding position overlooking Portland Harbour, which it was built to defend. In 1949, it became HM Prison The Verne.
Fort data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).