- Category: Geographic Feature
- Type: Valley
- Latitude/Longitude: 52°6'37"N 3°32'14"W
- Eastings/Northings: 294820, 246903
- OS Grid: SN948469
- Mapcode Local: GBR YH.976L
- Mapcode Global: VH5DN.M7T0
Location and coordinates are for the approximate centre of Cwm Syfien within this administrative area.
Geographic features and populated places may cross administrative borders.