- Category: Water Feature
- Type: Other Water Feature
- Latitude/Longitude: 53°9'39"N 3°59'53"W
- Eastings/Northings: 266500, 364500
- OS Grid: SH665645
- Mapcode Local: GBR 5W.4TGS
- Mapcode Global: WH54H.KT96
Location and coordinates are for the approximate centre of Nant Ddu within this administrative area.
Geographic features and populated places may cross administrative borders.