Fleam Dyke

Fleam Dyke is a linear earthwork spanning 4.8 km (3 mi) between Fulbourn and Balsham in Cambridgeshire, constructed between AD 330 and 510 [1]. The earthwork rises 7 metres high from ditch to bank, with its west-facing ditch suggesting construction by invading Saxons as a defensive barrier [1]. In the later Anglo-Saxon period, it served as the boundary of the Flendish Hundred administrative division [1]. Near Mutlow Hill, the earthwork passes a Bronze Age burial mound dating to approximately 2000 BC [1].