- Category: Geographic Feature
- Type: Valley
- Latitude/Longitude: 51°46'1"N 3°58'54"W
- Eastings/Northings: 263352, 209450
- OS Grid: SN633094
- Mapcode Local: GBR DW.ZYVC
- Mapcode Global: VH4JH.XVX9
Location and coordinates are for the approximate centre of Cwm Cathan within this administrative area.
Geographic features and populated places may cross administrative borders.