Parc national de Brecon Beacons - Pen y Fan

Pen y Fan () is the highest peak in south Wales, situated in the Brecon Beacons National Park. At 886 metres (2,907 ft) above sea-level, it is also the highest British peak south of Cadair Idris in Snowdonia. The twin summits of Pen y Fan and Corn Du at 873 m (2,864 ft) were formerly referred to as Cadair Arthur or 'Arthur's Seat'.

Corn Du is a summit of the twin topped Pen y Fan and the second highest peak in South Wales at 873 m (2,864 ft), 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.

Y Gyrn is a top of Pen y Fan in South Wales, situated in the Brecon Beacons National Park. Tommy Jones' Obelisk is found in between the summit and Corn Du.The summit is a boggy mound overlooking the A470 and the Storey Arms. It is marked by a pile of stones.