This second bypass cut Heol Persondy in two, which was the road from Aberkenfig to Sarn, and reduced it to a footpath.
The historic parish church is Holy Trinity, part of the Ridgeway Benefice, in the Clun Forest deanery of the Church of England's Diocese of Hereford.
It consists of the haufendorf (an irregular, unplanned and quite closely packed village, built around a central square) village of Sarn on the Heinzenberg mountains.
The Ski School of Sarn/Heinzenberg in Switzerland claims to hold the world record with a ski class of 594 pupils - which is really amazing taking into account the size of this tiny resort with one chairlift an one T-Bar lift only.
Presenter Neil Oliver visited the sands of Aberdyfi and Ynyslas, near Borth, and examined the remains of the submerged forest and Sarn Badrig which are revealed at low tide, assisted by local historians and dendrochronologists.