- Category: Geographic Feature
- Type: Valley
- Latitude/Longitude: 52°14'12"N 3°12'27"W
- Eastings/Northings: 317624, 260522
- OS Grid: SO176605
- Mapcode Local: GBR YX.1BYR
- Mapcode Global: VH69Q.C12P
Location and coordinates are for the approximate centre of Cwm Du within this administrative area.
Geographic features and populated places may cross administrative borders.