- Category: Geographic Feature
- Type: Valley
- Latitude/Longitude: 51°42'46"N 3°5'0"W
- Eastings/Northings: 325231, 202133
- OS Grid: SO252021
- Mapcode Local: GBR J2.372Q
- Mapcode Global: VH79R.H6PQ
Location and coordinates are for the approximate centre of Cwm Du within this administrative area.
Geographic features and populated places may cross administrative borders.