Plaques marking the three stages of construction of the Vyrnwy Reservoir. Lake Vyrnwy (Llyn Efyrnwy) is a reservoir constructed in the 1880s for Liverpool Corporation Waterworks to supply Liverpool with fresh water. It flooded the head of the Vyrnwy 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 Hafren Dyfrdwy. When the reservoir is full, it is 26 metres (84 ft) deep, contains 59.7 gigalitres, and covers an area of 4.54 square kilometres (1,121 acres), the lake has a perimeter of 19 kilometres (12 mi) with a road that goes all the way around it. Its length is 7.64 kilometres (4.75 mi).
The Brecon Beacons Mountain Centre was opened in 1966 and funded by the Carnegie Trust and was overseen by the local council and the Brecon Beacons National Park Authority. Its aim was to provide an information centre for tourists and visitors to the National Park regarding the mountains, the local towns and the countryside and enable them all to better interpret the area. The facility is now wholly owned and managed by the Brecon Beacons National Park Authority.
