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U-Boat Bunker Martha

This German bunker for submarines, named "Martha", was constructed in World War II. it has a length of 250 meter and there was room for 20 submarines, in 13 docks.

Because of expansion of the harbor, the bunker is not connected tot the water anymore. There is some damage visible of the Allied bombardment of 2 December 1943.

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43.338018, 5.346939