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
St Martin's Church, Pen-y-clawdd St Martin's Church, Pen-y-clawdd The Church of St Martin, Pen-y-clawdd, Monmouthshire, Wales is a parish church with Norman origins which was rebuilt in the 15th century. It is located on the site of an early Welsh defensive earthwork. The church was restored in 1884-85. It remains an active church in the parish of Llangovan with Pen-y-clawdd. It is a Grade II* listed building. The church dates from the Norman period but is located on the site of an earlier earthworks. The present building was constructed in the late 15th or early 16th centuries. The church was restored in the Victorian