- Category: Geographic Feature
- Type: Valley
- Latitude/Longitude: 52°4'10"N 4°38'2"W
- Eastings/Northings: 219558, 244528
- OS Grid: SN195445
- Mapcode Local: GBR D0.CR6J
- Mapcode Global: VH2MW.M7HQ
Location and coordinates are for the approximate centre of Cwm Du within this administrative area.
Geographic features and populated places may cross administrative borders.