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Maen Mawr Maenhir and
stone circle at Trianglas, Fforest They stand in Marshy ground on a small level promontory below Llyn-y-Fan Fawr and above the head of the River Tawe. The Maen Mawr is an oblong block of sandstone 2 m high and stands 10 metres outside the circle to the north. The circle is called Cerrig Duon (black stones) circle and has a diameter of 20 meters with 21 stones up to 0.6m tall still remaining. |
