A small whitewashed church on a rocky islet off the coast south of Aberffraw, cut off at high tide and reached by a causeway at low water. It dates from the twelfth century and is still used for occasional services. Check the tide times before you walk out.
Eglwys Cwyfan
Tiny twelfth-century church on a tidal islet near Aberffraw, the 'church in the sea'
Most visitors miss this
Simply stunning from every angle. Amazingly, this tiny Anglesey church dates to the 12th century.