- Category: Water Feature
- Type: Other Water Feature
- Latitude/Longitude: 52°11'4"N 3°45'50"W
- Eastings/Northings: 279500, 255500
- OS Grid: SN795555
- Mapcode Local: GBR Y5.4K0Q
- Mapcode Global: VH5D4.QC05
Location and coordinates are for the approximate centre of Nant Cwm-du within this administrative area.
Geographic features and populated places may cross administrative borders.