Cefn Sidan, roughly translated from Welsh, means "Silky Back". This long sandy beach and its dunes form the outer edge of the Pembrey Burrows between Burry Port and Kidwelly, looking southwards over Carmarthen Bay in South Wales. Cefn Sidan is the longest beach in Europe, stretching an incredible 8 miles from the coastal town of Burry Port to Tywyn point, near Kidwelly.