- Category: Geographic Feature
- Type: Valley
- Latitude/Longitude: 52°59'27"N 3°55'4"W
- Eastings/Northings: 271359, 345478
- OS Grid: SH713454
- Mapcode Local: GBR 5Z.HNR3
- Mapcode Global: WH55H.S2HS
Location and coordinates are for the approximate centre of Nant Dwr-Oer within this administrative area.
Geographic features and populated places may cross administrative borders.