This enormous 19th-century neo-Norman castle sits between Snowdonia and the Menai Strait. It's crammed with fascinating items, such as a one-ton slate bed made for Queen Victoria, elaborate carvings, plasterwork and mock-Norman furniture.
A remarkable underground experience. Abandoned in 1903 but now reopened to visitors, Sygun tells the story of Victorian miners. Nowadays, it’s hard to believe that such gritty industrial heritage exists amongst so much natural beauty.