Fan Brycheiniog is the highest peak at a height of 802.5 metres (2,633 ft) (above sea level) in the Black Mountain (Y Mynydd Du) region of the Brecon Beacons National Park in southern Wales. There is a trig point at the peak and on the edge of the escarpment, and nearby, a stone shelter with an inner seat. It lies just inside the historic county of Brecknockshire (now part of the Powys council area) which gives the mountain its Welsh name. A subsidiary top (Fan Foel), less than a kilometre from the summit along the ridge to the northwest, is the highest point (county top) of the neighboring county of Carmarthenshire. Fan Brycheiniog is also within the Fforest Fawr Geopark designated in 2005 in recognition of the area's geological heritage. The views of the moorland and open country to the