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-Gwryd was developing in North Wales. In May 1898 "The Climbers Club" originated at Pen-y-Gwryd, as it is recorded in its first journal "...its natural birth at Pen-y-Gwryd" and "...its congenial atmosphere... ("The Climbers Club") first struck its roots". The "Climbers Club" is now based at "Helyg" on the A5 between Capel Curig and Ogwen Cottage. In 1870 the "Society of Welsh Rabbits" (c.1865) was founded with the objective of exploring Snowdonia in winter (and as close to Christmas as possible). Ann Owen said in 1895 that the society had written an article "praising Pen-y-Gwryd as an excellent resort at Christmas".