Newport, Wales the Cardiff Bay Barrage. A Local Nature Reserve is established at Allt-yr-yn. Newport City footbridge is a cycle and pedestrian bridge in Newport city centre linking the east and west banks of the River Usk. A cycle and pedestrian walkway on the west bank of the River Usk links Newport city centre at Crindau to central Caerleon. There is a marked heritage trail in Caerleon. A cycle and pedestrian walkway is on both banks of the River Usk. The East bank path links Newport Bridge to Lliswerry. The West bank path links Newport Bridge to Newport Transporter Bridge and to
River Severn at Tewkesbury, Gloucestershire. The port of Bristol is on the Severn Estuary, where another River Avon flows into it through the Avon Gorge. The River Wye, from its source in Plynlimon, Wales ( from the source of the Severn), flows generally south east through the Welsh towns of Rhayader and Builth Wells. It enters Herefordshire, flows through Hereford, and is shortly afterwards joined by the River Lugg, before flowing through Ross-on-Wye and Monmouth, and then southwards where it forms part of the boundary between England (Forest of Dean) and Wales. It flows into the Severn near the town of Chepstow,