Very impressive and largely a hidden treasure-worth a walk along its course-it'll take a leisurely 10 minutes.
Marvel at the depth of the dyke-40-50 feet deep in places.
An important defensive structure reputedly built by the Cattavelauni tribe and still used as late as the War of the Roses-where it formed part of the line of the Yorkists in the 2nd Battle of St Albans.
Have a pint in the Ancient Briton afterwards-although a Harvester, still you can get Well's Bombadier in there!
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