- Category: Water Feature
- Type: Other Water Feature
- Latitude/Longitude: 52°59'56"N 4°0'20"W
- Eastings/Northings: 265500, 346500
- OS Grid: SH655465
- Mapcode Local: GBR 5V.H5GT
- Mapcode Global: WH558.FWSC
Location and coordinates are for the approximate centre of Llynnau Diffwys within this administrative area.
Geographic features and populated places may cross administrative borders.