- Category: Geographic Feature
- Type: Valley
- Latitude/Longitude: 51°46'17"N 4°30'2"W
- Eastings/Northings: 227558, 211034
- OS Grid: SN275110
- Mapcode Local: GBR D6.ZN8V
- Mapcode Global: VH2P9.YQ0X
Location and coordinates are for the approximate centre of Cwm Bychan within this administrative area.
Geographic features and populated places may cross administrative borders.