- Category: Geographic Feature
- Type: Valley
- Latitude/Longitude: 51°40'55"N 3°38'10"W
- Eastings/Northings: 286973, 199401
- OS Grid: SS869994
- Mapcode Local: GBR HB.562G
- Mapcode Global: VH5GJ.XZHG
Location and coordinates are for the approximate centre of Cwm Nant-Du within this administrative area.
Geographic features and populated places may cross administrative borders.