A causewayed enclosure has been identified by the National Monument Record from an aerial photograph. In 1997 the NMR identified a series of interrupted cropmarks in Burham as a possible Neolithic causewayed enclosure. The features appear to comprise two parallel, curved lines of ditches which are between 12m-15m apart and approximately 140m long. They run in a N-W direction for 50m before changing direction in a smooth curve towards the N-E. The ditches range in size from 7m to 28m and are separated by narrow causeways 2m-6m across. Two parallel lines of interrupted ditches, 15 metres apart, can be seen on 1990 and 1999 aerial photographs. The cropmarks start at 571946 162482 and are visible for a length of 90 metres, angled North-North-East to South-South-East, to 572007 162380.This may form the other side of the enclosure. It is unknown if the large feature centred at 57189 16238 is natural, connected with the enclosure or an archaeological feature connected with another archaeological site (TQ 76 SW 53). Summary from record TQ 76 SW 440: A Neolithic causewayed enclosure east of Margetts Lane, Burham.