Grwyne Fawr Reservoir
Q156150, United Kingdom
The Grwyne Fawr Reservoir is located in the valley of the river Grwyne Fawr in the Brecon Beacons National Park, Wales. Completed in 1928, it has the capacity to hold 400,000,000 imperial gallons (1, 800 megalitres).
Reservoir data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).