River Lugg River Lugg The River Lugg () rises near Llangynllo, Powys. It flows through the border town of Presteigne, Wales then through Herefordshire, England, to the south of Leominster where it meets a tributary, the River Arrow. Its confluence with the River Wye is at Mordiford, downstream of Hereford and from its source. Below Leominster the river was made navigable under the "River Wye & Lugg Navigation Act 1696" for improving the River Wye, and had pound locks. Despite several attempts to improve it, including making flash locks against bridges, the river was probably never a satisfactory navigation. Commercial navigation probably
Wye Valley in the area of Symonds Yat and Slaughter Stream Cave near Berry Hill. At St Arvans, near Chepstow, the underground watercourses have carved out long cave systems, which exit at Otter Hole at the base of Piercefield cliffsthe only cave system in England or Wales which can only be reached through a tidal sump, making it a mecca for experienced cavers. Lancaut and Ban-y-Gor are Gloucestershire Wildlife Trust nature reserves. They both have SSSI status being part of the nationally important Lower Wye Gorge SSSI and within the Wye Valley AONB. The Wye Valley is important for its rich wildlife