Cwm Doethie – Mynydd Mallaen

Cwm Doethie – Mynydd Mallaen is a Site of Special Scientific Interest in Ceredigion and Carmarthenshire, mid Wales. Contained within it is the Allt Rhyd y Groes national nature reserve designated principally because of its sessile oak woodland clinging to near vertical cliffs of the River Doethie gorge.