- Category: Geographic Feature
- Type: Valley
- Latitude/Longitude: 52°47'54"N 3°39'36"W
- Eastings/Northings: 288176, 323607
- OS Grid: SH881236
- Mapcode Local: GBR 69.WRF2
- Mapcode Global: WH67J.RXBK
Location and coordinates are for the approximate centre of Cwm Du within this administrative area.
Geographic features and populated places may cross administrative borders.