- Category: Landcover
- Type: Forest or Wood
- Latitude/Longitude: 51°59'27"N 3°43'48"W
- Eastings/Northings: 281307, 233903
- OS Grid: SN813339
- Mapcode Local: GBR Y7.JMG1
- Mapcode Global: VH5F4.97F3
Location and coordinates are for the approximate centre of Allt Pen-twyn within this administrative area.
Geographic features and populated places may cross administrative borders.