Fodor's Expert Review Kastelholm Castle

Kastelholm is a wonderfully preserved medieval castle, with 14th-century origins, built by the Swedes to strengthen their presence on Åland. The nearby 18th-century Vita Björn prison is also worth a visit, and there is a treasure hunt and period costumes for the children, making this a great family destination. By turns, the castle has been a seat of Swedish royal bailiffs and a hunting lodge as well as the victim of damaging fires and sieges. Visits out of season can be made by arrangement.