What is "llanfihangel-y-traethau"

Llanfihangel-y-traethau ("St. Michael's on the Beaches") was a parish in Ardudwy, Gwynedd, north-west Wales centred on a church of the same name in the village of Ynys. The original parish church was built in the 12th century on a tidal island. Later the land rose and connected the island to the mainland. Today it is part of the Bro Ardudwy ministry area, which includes Harlech, a few kilometres to the southwest, and Barmouth. The church has a window depicting Saint Tecwyn and is the start of the Saint Tecwyn's Way, a pilgrimage route ending at Saint Tecwyn's church in Llandecwyn.