- Category: Geographic Feature
- Type: Valley
- Latitude/Longitude: 51°43'57"N 3°57'3"W
- Eastings/Northings: 265374, 205578
- OS Grid: SN653055
- Mapcode Local: GBR GY.2XNJ
- Mapcode Global: VH4JQ.GQP2
Location and coordinates are for the approximate centre of Cwm Cellfen within this administrative area.
Geographic features and populated places may cross administrative borders.