Offa's Dyke Path is one of twelve designated National Trails. With Hadrians Wall It is the only national trail to follow a man-made feature. Built by Offa, King of Mercia in 757 to 796 AD the dyke formed the boundary between England & Wales, running 182 miles from Prestatyn in the north to Sedbury, near Chepstow in the south. Men from the border country along the Mercian (English) side all had to contribute: they could send food or they could build 128cm of dyke.
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