19/07/2026
St Cwyfan's dates back to the 12th Century, and is on a tidal island named Cribinau, off the western coast of Anglesey.
It was built at the end of a peninsula between two bays, as shown on a map from 1636.
A causeway was created so people could access the island and church.
But even with this, high tides sometimes made it inaccessible, meaning services were sometimes held at a nearby house.
By the late 19th Century, the building was roofless and disused because another place of worship had opened in a more accessible location.
Architect Harold Hughes started raising money to build a seawall and restore it.
Work was carried out, and in 2006, the weather-stained walls were whitewashed, making it stand out off the coast.
Today, the island can only be reached at low tide - and people are advised to check the tide times
Wales
