Llyn Cwm Llwch both Pen y Fan and Corn Du and indeed from the spur of Pen Milan to its west. Llyn Cwm Llwch Llyn Cwm Llwch () is a small lake or pool in the Brecon Beacons National Park in Powys, Wales. It is between 1 and 2 acres: much smaller than the two glacial lakes in the west of the Black Mountain (range): Llyn y Fan Fawr and Llyn y Fan Fach. It is of glacial origin, occupying a rock hollow beneath the peaks of Pen y Fan and Corn Du in the central Brecon Beacons. It is drained by the
Pen-y-garn, Ceredigion Pen-y-garn, Ceredigion Pen-y-garn is a small village in the Tirymynach district of Ceredigion, Wales, approximately 4 miles (6 km) north-east of Aberystwyth. Along with the hamlet of Rhydypennau, Pen-y-garn is now often considered to be part of the neighbouring larger village of Bow Street. All three places stretch in a long narrow strip along the main Aberystwyth to Machynlleth road (A487). As well as the houses on the main road from Cross Street (Y Lon Groes) up to Ysgol Rhydypennau, Pen-y-garn also includes the housing estates of Maes Ceiro, Bryn Meillion, Maes y Garn and Cae'r Odyn. Pen-y-garn ("head of