- Category: Geographic Feature
- Type: Valley
- Latitude/Longitude: 52°3'47"N 4°36'59"W
- Eastings/Northings: 220727, 243756
- OS Grid: SN207437
- Mapcode Local: GBR D1.D3KG
- Mapcode Global: VH2MW.XDQS
Location and coordinates are for the approximate centre of Cwm Du within this administrative area.
Geographic features and populated places may cross administrative borders.