Iron Mine

Stockholm Archipelago

The most unusual of Utö's sights is the remains of Sweden’s oldest iron mine, which opened in 1150 and closed in 1879. The three pits are now flooded – the deepest is Nyköpingsgruvan (215m). They're an atmospheric and impressive sight. The tiny mining museum (in a wooden cottage opposite the Värdshus hotel) keeps variable hours (roughly 1pm to 4pm in summer); check locally.

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