- Category: Geographic Feature
- Type: Valley
- Latitude/Longitude: 52°47'14"N 3°13'59"W
- Eastings/Northings: 316936, 321794
- OS Grid: SJ169217
- Mapcode Local: GBR 6W.XF3P
- Mapcode Global: WH792.96NJ
Location and coordinates are for the approximate centre of Gwern y Glyn within this administrative area.
Geographic features and populated places may cross administrative borders.