- Category: Geographic Feature
- Type: Valley
- Latitude/Longitude: 51°33'51"N 3°37'8"W
- Eastings/Northings: 287879, 186287
- OS Grid: SS878862
- Mapcode Local: GBR HB.DQFN
- Mapcode Global: VH5H4.7Y45
Location and coordinates are for the approximate centre of Cwm Cefnydfa within this administrative area.
Geographic features and populated places may cross administrative borders.