- Category: Geographic Feature
- Type: Valley
- Latitude/Longitude: 51°39'16"N 3°6'19"W
- Eastings/Northings: 323633, 195671
- OS Grid: ST236956
- Mapcode Local: GBR J1.6TX6
- Mapcode Global: VH79Y.4N6Y
Location and coordinates are for the approximate centre of Cwm Gwyddon within this administrative area.
Geographic features and populated places may cross administrative borders.