- Category: Water Feature
- Type: Other Water Feature
- Latitude/Longitude: 51°31'15"N 3°38'14"W
- Eastings/Northings: 286500, 181500
- OS Grid: SS865815
- Mapcode Local: GBR H9.HKTB
- Mapcode Global: VH5HH.W1ZB
Location and coordinates are for the approximate centre of Nant Ffornwg within this administrative area.
Geographic features and populated places may cross administrative borders.