- Category: Water Feature
- Type: Other Water Feature
- Latitude/Longitude: 52°57'38"N 4°8'16"W
- Eastings/Northings: 256500, 342500
- OS Grid: SH565425
- Mapcode Local: GBR 5P.KHBM
- Mapcode Global: WH55D.DVV6
Location and coordinates are for the approximate centre of Llyn Du within this administrative area.
Geographic features and populated places may cross administrative borders.