Castell Dyffryn Mawr

Castell Dyffryn Mawr is an isolated ditched motte on high ground which  overlooks a minor (and marshy) river confluence of the Nevern, and has good views down the valley, but it must have been very isolated. The summit of the motte has a depression that may have been lined with a drystone wall. The site shows no evidence of a bailey, and there is no church nearby, suggesting it served a primarily military or symbolic purpose.