- Category: Geographic Feature
- Type: Valley
- Latitude/Longitude: 51°36'21"N 3°36'2"W
- Eastings/Northings: 289246, 190911
- OS Grid: SS892909
- Mapcode Local: GBR HC.B305
- Mapcode Global: VH5GY.JWSN
Location and coordinates are for the approximate centre of Cwm Du within this administrative area.
Geographic features and populated places may cross administrative borders.