- Category: Geographic Feature
- Type: Valley
- Latitude/Longitude: 53°2'15"N 4°9'39"W
- Eastings/Northings: 255208, 351106
- OS Grid: SH552511
- Mapcode Local: GBR 5N.DPQC
- Mapcode Global: WH550.1XW5
Location and coordinates are for the approximate centre of Cwm Dû within this administrative area.
Geographic features and populated places may cross administrative borders.