On the Neolithic Marathon Wansdyke was a bit of a surprise. I came up towards the top of the first line of downs out of Avebury and found myself looking down and along this massive earthwork. A quick search via Google has told me that the name may relate it to pagan god Woden, it was built around 600 ad, and runs from near Bristol to Savernake Forest near Marlborough. Its exact origins and purposes remain a mystery, with the name being given by Saxons who arrived after it had been built, and possibly thought it to be an act of god.
According to my researches along its length it varies from possibly totally absent to barely visible to a bank 4 metres high with a 2.5 metre deep ditch. I was on one of it's more visible points. Had I not been in the middle of doing a marathon I'd have loved to walk off down the path that could be seen following its course!
The point I crossed Wansdyke was at Tan Hill, which is North of All Cannings and Stanton St Bernard. As part of the marathon the hill top is nicely turfed, but full of rabbit holes. From Wansdyke (by the way, you don't have to do any real bank climbing) you head over the crest, then down a little, coming into the full blast of any wind (it was fierce), then skirt around the hill of Rybury Camp, an Iron Age hill fort, and another ancient monument I didn't really get chance to explore! The side of the hill is steep and you cut across via terraced sheep paths, a little scary if you are scared of heights, though some mountain bikers did ride across when I was there. From there the path drops down very steeply into the Vale of Pewsey.
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