Wye Valley Wye Valley The Wye Valley Area of Outstanding Natural Beauty (AONB; ) is an internationally important protected landscape straddling the border between England and Wales. It is one of the most dramatic and scenic landscapes in Britain. The River Wye () is the fifth-longest river in the United Kingdom. The upper part passes through Rhayader, Builth Wells and Hay-on-Wye, but the area designated as an AONB covers surrounding a stretch lower down the river, from just south of Hereford to Chepstow. This area covers parts of the counties of Gloucestershire, Herefordshire and Monmouthshire, and is recognised in particular for its
England–Wales border England–Wales border The England–Wales border, sometimes the Wales–England border or the Anglo-Welsh border, is the border between England and Wales, two constituent countries of the United Kingdom. It runs for , from the Dee estuary, in the north, to the Severn estuary in the south. It has followed broadly the same line since the 8th century, and in part that of Offa's Dyke; the modern boundary was fixed in 1536, when the former marcher lordships which occupied the border area were abolished and new county boundaries were created. The administrative boundary of Wales was confirmed in the Local Government Act