- Category: Geographic Feature
- Type: Valley
- Latitude/Longitude: 51°33'51"N 3°32'15"W
- Eastings/Northings: 293512, 186177
- OS Grid: SS935861
- Mapcode Local: GBR HG.DLVS
- Mapcode Global: VH5H5.MYM3
Location and coordinates are for the approximate centre of Cwm Dwr within this administrative area.
Geographic features and populated places may cross administrative borders.