Eglwys bach y mor ( Welsh for "the little church in the sea"). This 12th century monument holds a brilliant story of survival through the ages. A Jacobean map dated 1636 shows the church standing on the mainland of Anglesey, but with approaching roads battered by the coastal weather, it seems to be after that date that sea erosion of the boulder clay cliffs turned Cribinau into an island. By the 19th century, erosion was causing graves in the churchyard to fall into the sea, so a seawall was built around the island to protect the remaining graves and the church itself. Although now isolated it is still accessible at low tides when wanderers can find a donation box which helps the chapel to continue its fight against the sea and open for the occasional ceremony throughout the year.