Amesbury is a town and civil parish in Wiltshire, England. It is known for the prehistoric monument of Stonehenge which is within the parish. T…Amesbury is a town and civil parish in Wiltshire, England. It is known for the prehistoric monument of Stonehenge which is within the parish. The town is claimed to be the oldest occupied settlement in Great Britain, having been first settled around 8820 BC. The parish includes the hamlets of Ratfyn and West Amesbury, and part of Boscombe Down military airfield.