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Once a Nazi stronghold, now a ghostly enigma, this island's haunting history and hidden dangers make it one of Germany's most intriguing mysteries.

Over 750,000 bunkers were built, though many have been removed to make way for urban development or blown up by scrap merchants to harvest and sell their steel. But many still remain, abandoned ...

Food storage is a popular use for the structures. Here, Alex Lussi of Swiss mushroom producer Gotthard-Pilze picks a shiitake mushroom inside a former ammunition bunker near the town of Erstfeld ...

After years of military expansion, everything Iran was trying to build in Syria is in ruins Mouldy half-finished food on bunk beds, discarded military uniforms and abandoned weapons - these are ...