U-Boot-Bunker Valentin
U-Boot-Bunker Valentin stands beside the Weser in Rekum, a Bremen suburb, as a vast reinforced-concrete factory bunker. Its roof rises between 22.5 and 27 metres, while walls reach 4.5 metres thick.
Built during the Second World War, the complex was intended to assemble German U-boats from prefabricated sections made elsewhere. Thirteen assembly bays, workshops and storerooms filled its interior. Forced labourers, including concentration-camp prisoners and prisoners of war, built the facility under brutal conditions. Air raids damaged the unfinished factory before submarine production could begin, leaving the structure about 90 percent complete. Today, guided tours present the bunker as a museum and memorial, alongside a monument erected in 1983 for the workers who built it. Its most striking detail remains its scale: the concrete shell stretches roughly 426 metres along the river.
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