Devil's Bridge yw'r enw Saesneg am Bontarfynach. Mae pentref Pontarfynach yn sefyll ar yr Afon Mynach
lle mae'r afon wedi crafu hafn ddofn yn y graig. Roedd mynachod yn byw yn Abaty Ystrad Fflur ym 1075. Yn ôl y chwedl, cafodd
un o'r mynaich ei ladd wrth groesi'r hafn. Penderfynodd adeilad pont i osgoi damweiniau yn y dyfodol, ond roedd problem fawr
gyda'r hafn - gan ei bod hi'n anodd iawn i adeiladu pont.
Yn ôl y chwedl, cynigodd y diawl adeiladu'r bont, ond y pris am ei waith oedd enaid y creadur cyntaf i groesi'r bont. Ar ôl i'r diawl wedi gorffen y gwaith arhosodd am ei wobr. Yn anffodus i'r diawl, roedd y bobl yn y pentref wedi gwneud cynllun. Ro'n nhw wedi osgoi rhoi enaid i'r diawl drwy daflu bara torth gron y bont. Aeth ci ar ôl y bara, a chafodd y diawl ddim o'i wobr.
Yn y ddeunawfed ganrif roedd yr hen bont yn beryglus, ond i osgoi'r broblem o adeiladu pont newydd dros yr hafn, adeiladon nhw y bont newydd dros yr hen bont. Defnyddion nhw yr hen bont i gynnal yr ysgaffaldau. Cafodd y drydedd bont ei hadeiladau ym 1901 dros yr ail bont. Mae'r drydedd bont yn cael ei defnyddio hyd heddiw.
The English name for Pontarfynach is Devil's Bridge. The village of Pontarfynach is situated on the Mynach River
at a place where the river has carved a deep, rocky chasm. Around the year 1075 there were monks living nearby at Strata Florida.
According to legend, one of the monks was killed as he tried to cross the chasm. It was decided that a bridge was needed
to avoid future accidents but the terrain made it very difficult to construct a bridge.
It is said that the Devil offered to build a bridge across the chasm in return for the soul of the first living creature to cross the finished bridge. The Devil finished constructing the bridge and was waiting for his prize but the people came up with a plan to outwit him. Instead of sacrificing one of the people of the village to the devil they threw a round loaf of bread across the bridge for a dog to chase and so the Devil did not get his prize.
In the eighteenth century the original bridge was thought to be insecure but instead of replacing it another bridge was built over the top. The first bridge was used to support the scaffolding during the construction of the second bridge. A third bridge was added over the top of the second in 1901 that carries traffic over the Mynach to this day.
