- Category: Water Feature
- Type: Other Water Feature
- Latitude/Longitude: 51°50'19"N 4°0'42"W
- Eastings/Northings: 261500, 217500
- OS Grid: SN615175
- Mapcode Local: GBR DV.V9LB
- Mapcode Global: VH4J9.F11M
Location and coordinates are for the approximate centre of Afon Marlas within this administrative area.
Geographic features and populated places may cross administrative borders.