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-Mount Junction railway station the Welsh Highland Railway and took possession of the line from Traeth Mawr to Pen-y-Mount and, since 2009, WHHR trains have terminated at Pen-y-Mount. It is hoped that in future the WHHR will have running rights over the FR-owned WHR mainline and that the station will become an interchange between the two railways. The two companies, however, are still in discussion over these issues and have yet to reach an agreement. It is intended that Pen-y-Mount Junction will have three platforms, with lines to Beddgelert and both Porthmadog Termini. Pen-y-Mount Junction railway station Pen-y-Mount Junction station is the northern terminus