- Category: Geographic Feature
- Type: Valley
- Latitude/Longitude: 52°18'10"N 3°14'9"W
- Eastings/Northings: 315825, 267924
- OS Grid: SO158679
- Mapcode Local: GBR 9W.X3YT
- Mapcode Global: VH699.VCNW
Location and coordinates are for the approximate centre of Cwm Nantywylan within this administrative area.
Geographic features and populated places may cross administrative borders.