- Category: Geographic Feature
- Type: Valley
- Latitude/Longitude: 52°1'22"N 3°46'28"W
- Eastings/Northings: 278333, 237534
- OS Grid: SN783375
- Mapcode Local: GBR Y5.GNCS
- Mapcode Global: VH5DX.JFC5
Location and coordinates are for the approximate centre of Cwm Gefail within this administrative area.
Geographic features and populated places may cross administrative borders.