- Category: Geographic Feature
- Type: Valley
- Latitude/Longitude: 52°53'10"N 4°34'31"W
- Eastings/Northings: 226825, 335198
- OS Grid: SH268351
- Mapcode Local: GBR 53.QC15
- Mapcode Global: WH44F.PQH5
Location and coordinates are for the approximate centre of Nant Llaniestyn within this administrative area.
Geographic features and populated places may cross administrative borders.