The Battle of Bomarsund was fought by an Anglo-French task force against Russian defenses at Bomarsund during the Crimean War. The Anglo-French task force won and the fortress war as a result destroyed, so only the ruins of the fortress remains.
This is sight really worth seeing! The actual ruins are outdoors - of cause – and there is no entrance and no fees. There is a little museum in a small pilot-cabin across the bridge the is for free as well.
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