Magic lantern slide circa 1900.Victorian/Edwardian.Social History.Lake Vyrnwy (Welsh: Llyn Efyrnwy, pronounced [??v?rn??] or Llyn Llanwddyn) being built in the 1880's . A reservoir in Powys, Wales, built in the 1880s to supply Liverpool with fresh water. It flooded the head of the Vyrnwy (Welsh: Afon Efyrnwy) valley and submerged the village of Llanwddyn. The Lake Vyrnwy Nature Reserve and Estate that surrounds the lake is jointly managed by the Royal Society for the Protection of Birds (RSPB) and Severn Trent Water is a popular destination for ornithologists, cyclists and hikers. The reserve is designated as a national nature reserve, a Site of Special Scientific Interest, a Special Protection Area, and a Special Area of Conservation