- Category: Geographic Feature
- Type: Valley
- Latitude/Longitude: 51°54'27"N 3°0'32"W
- Eastings/Northings: 330686, 223714
- OS Grid: SO306237
- Mapcode Local: GBR F6.PSB9
- Mapcode Global: VH78T.S9MZ
Location and coordinates are for the approximate centre of Cwm Iau within this administrative area.
Geographic features and populated places may cross administrative borders.