Corn Du is a mountain immediately to the southwest of
Pen y Fan and the second highest peak in
South Wales at 2864 feet, situated in the
Brecon Beacons National Park. The summit itself is marked by a well structured
Bronze Age cairn with a central burial
cist like that on nearby Pen y Fan. The two summits are visible from great distances owing to their height above the surrounding
moorland, and are famous
landmarks. The views from the peaks are also panoramic and very extensive, the
Black Mountain (range) and
Fforest Fawr being especially obvious to the west.
Mynydd Epynt is visible to the north behind the county town of
Brecon, and other parts of the escarpment to the east.