- Category: Geographic Feature
- Type: Valley
- Latitude/Longitude: 51°59'9"N 3°30'16"W
- Eastings/Northings: 296783, 233010
- OS Grid: SN967330
- Mapcode Local: GBR YJ.K3C8
- Mapcode Global: VH5F8.6BPY
Location and coordinates are for the approximate centre of Cwm Gwnyn within this administrative area.
Geographic features and populated places may cross administrative borders.