- Category: Geographic Feature
- Type: Valley
- Latitude/Longitude: 51°40'1"N 3°36'0"W
- Eastings/Northings: 289439, 197690
- OS Grid: SS894976
- Mapcode Local: GBR HC.636H
- Mapcode Global: VH5GR.KC4B
Location and coordinates are for the approximate centre of Cwm Gwynfi within this administrative area.
Geographic features and populated places may cross administrative borders.