The Cemaes and Llanbadrig areas contain the oldest fossils in England or Wales, 860 million year old bacteria (stromatolites) that produced oxygen that made the Earth able to create other life and kick start evolution. They are found in blocks of jumbled rock called mélange for which Anglesey is famous. Melange also includes rocks injected as lava (dykes) when southern England and Wales crashed into Scotland 450 million years ago. Follow the rock trail to see all Anglesey’s rocks at Trwyn y Penrhyn. At Llanbadrig, also in mélange, St Patrick on his way to convert Ireland was wrecked near the coast. Come and see the story unfold at his cave, well and church that he founded. Between the 2 sites be amazed at the time and tide bell that chimes when the tide comes in by the harbour beach.