A footpath runs along the top of the Devil's Dyke, a scheduled Ancient Monument, affording great views of the surrounding countryside.
The chalky soil provides a habitat for some interesting and unusual plants, with grazing managed by sheep in places.
The northern end of the Dyke starts from Reach village green, adjacent to the edge of the fen, where the pub is called The Dyke's End.
It makes an excellent route for a walk, with various paths meeting up with it to form a circular route, if the whole length is too far.
The route of the Dyke then follows the parish boundary between Burwell and Swaffham Prior, the ditch being particularly deep in places here, before it crosses the A14, by way of a bridge.
A gap for Newmarket racecourse also crosses it at this point. It offers great views on racedays, of both the July course and Rowley Mile.
It eventually reaches the village of Wood Ditton, a total length of about 7 miles.
A car park for walkers is located on the B1102, between Burwell and Swaffham Prior.