- Category: Water Feature
- Type: Other Water Feature
- Latitude/Longitude: 51°39'55"N 3°35'56"W
- Eastings/Northings: 289500, 197500
- OS Grid: SS895975
- Mapcode Local: GBR HC.69DL
- Mapcode Global: VH5GR.KDNN
Location and coordinates are for the approximate centre of Nant Gwynfi within this administrative area.
Geographic features and populated places may cross administrative borders.