Tags: Site Of Special Scientific Interest.
Gallt Llanerch – Coed Gelli-deg is a Site of Special Scientific Interest (or SSSI) in the Gwaun Valley Pembrokeshire South Wales. It has been designated as a Site of Special Scientific Interest since January 1954 in an attempt to protect its fragile biological elements. The site has an area of 30.47 hectares and is managed by Natural Resources Wales.