Llyn-y-Fan-fawr,
Trianglas, Powys, Wales
National grid reference: SN 825207
The Maen Mawr is a 5 ft outlier of the Cerrig Duon (black stones) circle on a small plateau at the head of the River Tawe. The circle consists of 21 small stones with a 60 ft diameter. The site offers one of the most impressive views south down the Tawe valley.
