- Category: Geographic Feature
- Type: Valley
- Latitude/Longitude: 53°2'42"N 4°11'2"W
- Eastings/Northings: 253693, 351985
- OS Grid: SH536519
- Mapcode Local: GBR 5M.D45F
- Mapcode Global: WH54Z.PQVF
Location and coordinates are for the approximate centre of Cwmyffynnon within this administrative area.
Geographic features and populated places may cross administrative borders.