- Category: Geographic Feature
- Type: Valley
- Latitude/Longitude: 51°33'54"N 3°7'30"W
- Eastings/Northings: 322113, 185731
- OS Grid: ST221857
- Mapcode Local: GBR J0.DNMY
- Mapcode Global: VH6DV.SX8K
Location and coordinates are for the approximate centre of Cwm Du within this administrative area.
Geographic features and populated places may cross administrative borders.