Llyn Cefni
Isle of Anglesey, United Kingdom
Llyn Cefni is a small reservoir in the centre of Anglesey, Wales which is managed by Welsh Water and Hamdden Ltd, while the fishery is managed by the Cefni Angling Association. The reservoir is located just 1 kilometre (0.6 mi) northwest of the island's county town of Llangefni.
Reservoir data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).