Stanwick Iron Age Fortifications (also known as 'Stanwick Camp'), a huge Iron Age hill fort, sometimes but not always considered an oppidum, comprising over 9 kilometers of ditches and ramparts enclosing approximately 300 hectares (700 acres) of land, Haselgrove, C.C., Turbull, P. and Fitts, R.L., 'Stanwick, North Yorkshire, Part 1: Recent research and previous archaeological investigations', Archaeological Journal, No.147, 1990, pages 1–15, page 1 also John Wacher, in The Towns of Roman Britain, states over 700 acres and 284 hectares.