Bristling with cannons, this fortified tower on the island of Aspö was described by Admiral Nelson of the British Royal Navy as ‘impregnable’. You can visit it on an Äspoleden, a free car ferry that runs up to twice hourly in July and August from Handelshamnen, north of the Marinmuseum.
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Drottningskärs kastell
© Tomo08swe/Shutterstock
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