An earth structure, it was built by King Offa of Mercia, and at 270km long, it passed through Gloucestershire, Herefordshire, Radnorshire, Montgomeryshire, Shropshire, Denbighshire and Flintshire.
An earth structure, it was built by King Offa of Mercia, and at 270km long, it passed through Gloucestershire, Herefordshire, Radnorshire, Montgomeryshire, Shropshire, Denbighshire and Flintshire.