Tags: Site Of Special Scientific Interest.
Craig-y-Llyn is a Site of Special Scientific Interest in Glamorgan south Wales. It lies south of the village of Rhigos and north of the Rhondda Valleys.The Countryside Council for Wales states that the site has been categorised as a Site of Special Interest because it supports …two special habitat features and is also of special interest for a plant the Water Lobelia. The first habitat feature is standing water supporting aquatic plants typical of lakes with low nutrient content.