Suwon, South Korea: Impressive fortress is like a mini Great Wall

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Palmanova Star Fort – Palmanova, Italy - Atlas Obscura

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13.05.2018., Drnis , Croatia - The fortress Gradina is located in Drnis, at an elevation of 344 m above sea level, above the canyon of the river Cikola. Built on the site

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Minceta Fortress, Dubrovnik - Book Tickets & Tours

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Mont-Saint-Michel, France: An Island Fortress in the English Channel