An impressive rusticated-limestone structure of fifteen arches, set on a curve, Cefn-coed-y-cymmer viaduct was built to carry the Brecon and Merthyr Railway over the Taf Fawr. Constructed by Savin and Ward in 1866 to a design by H. Conybeare and A. Sutherland, it is 235m (770ft) long and 36.6m (120ft) high.

RCAHMW, 05 May 2010.

The viaduct has recently been refurbished and now forms part of the Taff Trail walking and cycling route.

L. Osborne, RCAHMW, 2012.