Key Places Amlwch Copper Kingdom: Parys Mountain Counting comments... Welcome to the Copper Kingdom -- for a time Parys Mountain produced more copper than any other mine in the world. Two Bridges That Changed Everything Counting comments... For thousands of years crossing the Menai Strait challenged human ingenuity – and many lives were lost – until In January 1826 a marvel of engineering ended Anglesey's isolation forever. Holyhead Maritime Museum Counting comments... The museum is a fascinating experience for the whole family.