English: Fleam Dyke looking NW "Fleam Dyke is one of Cambridgeshire's most impressive earthworks and a rare surviving example of a chalk grassland environment.

Excavations have shown that the Dyke began as a small rampart and ditch in the late 5th century AD. The ditch was enlarged and the rampart reinforced in the sixth century and again in the early 7th cenury.

It was probably built by the East Anglian Saxons to control the Icknield Way, the ancient routeway into East Anglia from the west."

-- from the information notices.

The profile of the dyke is well displayed by the dry grass in this section.