9 Fehmarn Sound Bridge, Germany The Fehmarn Sound Bridge connects the island of Fehmarn to the German mainland, spanning almost a kilometer of the Baltic Sea. It was constructed during the Cold War, and explosive vaults were embedded into its structure so the bridge could be blown up in case of inva
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17 Tsing Ma Bridge, Hong Kong With a span of almost 1400 meters, Hong Kong’s Tsing Ma Bridge is the longest rail-traffic suspension bridge in the world. It’s also an example of forethought in engineering -- it has two enclosed road and rail lines that can be used to evacuate the area in case of se…
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