Stonea Camp
Wimblington, United Kingdom
Stonea Camp is an Iron Age multivallate hill fort located at Stonea near March in the Cambridgeshire Fens. Situated on a gravel bank just 2 metres (6 ft 7 in) above sea-level, it is the lowest hill fort in Britain. Around 500 BC, when fortification is thought to have begun at this site, this "hill" would have provided a significant area of habitable land amidst the flooded marshes of the fens. The site exhibits at least two phases of development over several hundred years of settlement, with a D-shaped set of earth banks surrounded by a larger, more formal set of banks and ditches.
Archaeological site data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).