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-cae, Wrexham Pen-y-cae, Wrexham Pen-y-cae is a village and a local government community, the lowest tier of local government, part of Wrexham County Borough in Wales The population of the community taken at the 2011 census was 3,389. It adjoins the larger village of Rhosllanerchrugog. Pen-y-cae means 'head of the field' or 'end of the field'. It is not an uncommon name, with three other settlements in Wales having the same name - in Powys, Bridgend and Neath Port Talbot. Though often written as one word without hyphens, in its correct form the name is hyphenised due to the definite article 'y'