Fans of military history can tour this formerly top-secret Cold War–era base, complete with cannons aimed at sea and underground living space for 340 men. Information in English may be a little sparse, but if you book ahead you can usually arrange an English tour. The views are amazing, whether you opt to delve further or not.
Batteri Arholma
Stockholm Archipelago
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At this fortress-turned-museum you can check out the officers’ mess, kitchen, sleeping quarters and tunnels, plus two impressive 15.2cm cannons (they’re…
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6. Ålands Jakt och Fiskemuseum
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