Fan y Big the edge of its precipitous western face. The view of this face from Cribyn is regarded as very striking. Fan y Bîg has since lost its mountain status. The peak is prominent on the north facing escarpment of the central part of the Brecon Beacons and several footpaths cross the summit. All the surrounding land is open access and so walkers can go where they wish. In poor weather however, the paths are the safest route for access. The peak is often crossed by hikers aiming for Cribyn, Pen y Fan and Corn Du, and also forms part of the
Pen y Boncyn Trefeilw Pen y Boncyn Trefeilw Pen y Boncyn Trefeilw is a subsidiary summit of Cyrniau Nod in north east Wales. It forms a part of the Berwyn range called the Hirnantau. It has two tops: Stac Rhos and Pen y Cerrig Duon. Pen y Cerrig Duon is now listed as a deleted Nuttall due to re-surveying. The views from the summit are extensive, if unremarkable due to the featureless, flat moorland surroundings. The summit is marked by a small cairn, is which located only a few metres from a track road that continues on to the pass between Cyrniau Nod and