- Category: Geographic Feature
- Type: Valley
- Latitude/Longitude: 52°51'44"N 4°1'0"W
- Eastings/Northings: 264324, 331335
- OS Grid: SH643313
- Mapcode Local: GBR 5V.RNQQ
- Mapcode Global: WH561.89HY
Location and coordinates are for the approximate centre of Cwm Bychan within this administrative area.
Geographic features and populated places may cross administrative borders.