- Category: Geographic Feature
- Type: Valley
- Latitude/Longitude: 53°0'0"N 4°5'10"W
- Eastings/Northings: 260092, 346789
- OS Grid: SH600467
- Mapcode Local: GBR 5R.H3VG
- Mapcode Global: WH557.6VDF
Location and coordinates are for the approximate centre of Cwm Bychan within this administrative area.
Geographic features and populated places may cross administrative borders.