Arbury Banks is a hill fort southwest of Ashwell, Hertfordshire, England. It was probably first constructed during the late Bronze Age, 1000-700 BC. Standing at 90 m above sea level, it is one of a line of six similar hill forts along the northern Chilterns that includes Wilbury Hill Camp southwest of Letchworth. Excavations in the 1850s traced Arbury Banks' horseshoe-shaped ramparts and identified two opposed north-north-west and south-south-east entrances. Evidence was also discovered for several enclosures or buildings inside the fort. Arbury Banks has been suggested as a possible location for the Battle of Watling Street, where a small Roman force destroyed the army of Boudica. The site is a scheduled monument. Ordnance Survey grid reference: