- Category: Water Feature
- Type: Other Water Feature
- Latitude/Longitude: 52°52'30"N 3°52'51"W
- Eastings/Northings: 273500, 332500
- OS Grid: SH735325
- Mapcode Local: GBR 60.QZPG
- Mapcode Global: WH55X.CZ4S
Location and coordinates are for the approximate centre of Llyn Gelli-gain within this administrative area.
Geographic features and populated places may cross administrative borders.