Belsar's Hill

Belsar's Hill is a hillfort near Willingham, Cambridgeshire, England [1]. The site occupies an oval area measuring 220 by 265 metres, enclosing approximately 2.4 hectares (6 acres) [1]. At the time of its construction, the hill would have formed an island of firm soil surrounded by waterlogged fens [1]. The defences consisted of a single ditch measuring 10 to 15 metres wide and 1.5 metres deep, with a rampart built on a bank rising 2 to 4 metres high [1].