Cefn Cul is a hill in the Fforest Fawr sector of the Brecon Beacons National Park in the county of Powys, south Wales.
Translating from Welsh as 'little forest', it is named in opposition to the much larger area of unenclosed land to the south which is known as Fforest Fawr or the 'great forest'.
Fan Frynych and Craig Cerrig-gleisiad are protected as a national nature reserve which is owned and managed by the Countryside Council for Wales for its Arctic–alpine flora.
Gwrgan Fawr | Fforest Fawr | Rhinog Fawr | Llyn Arenig Fawr |