Llyn Fawr

Llyn Fawr is a lake in the Cynon Valley (Welsh: Cwm Cynon), South Wales, best known as the site of an important hoard of weapons and tools from the late Bronze Age and early Iron Age. It lies within Craig-y-Llyn an area designated a Site of Special Scientific Interest. Llyn Fawr has an area of 9.8 hectares (24 acres) and lies south of Rhigos in the Town of Aberdare in the unitary authority of Rhondda Cynon Taff. It lies near the source of the river Rhondda Fawr, at an altitude of 368 metres, and is overlooked by the crags of Craig y Llyn. Originally a smaller lake, it was converted into a reservoir in the early 20th century. The Llyn Fawr hoard was discovered between 1909 and 1913 during the construction of the reservoir. It contains...