Cefn Cil Sanws

Cefn Cil Sanws is a hill in the Brecon Beacons National Park within Merthyr Tydfil County Borough in south Wales.

An unexpected feature at this altitude is Merthyr Tydfil Golf Course which extends high onto the eastern and southern slopes of the hill.

[1] The hill is composed of a layer cake of rocks of Carboniferous age all tilted moderately to the south.

Also of interest is the rare rigid buckler fern which clings to the scree slopes on this western flank.

A public footpath and a bridleway at its southern end provide access from the A470 road and from Cefn-coed-y-cymmer.