Cynghordy Railway Viaduct is a curved railway viaduct, 30.5m high, across the Bran Valley, carried on 18 semi-circular headed brick and sandstone arches with square rough-faced rubble piers. It was built 1868 for the Central Wales Railway; engineer Henry Robertson. Still in use.

B.A.Malaws, RCAHMW, 06 April 2005.