Cae Blaen-dyffryn

Cae Blaen-dyffryn is a Site of Special Scientific Interest (SSSI) in Carmarthenshire, Wales.

The SSSI is rectangular in shape, approximately 0.15 mi by 0.09 mi in size, and located some 2 mi south-south-east of Cwmann. Its southern boundary abuts the A482 road.