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Hamburg, Germany
During a Korean travel show on Hamburg I remember seeing a rather unusual underwater tunnel. Aside from allowing pedestrians and bikes there was also a single lane for cars tightly packed in. I wanted to find this tunnel even though its not really a tourist destination.The tunnel was easy to find in the cruise ship district which was full of tourists, tour buses, and tour boats.London has a similar foot tunnel in Greenwich we used to visit as kids, built in Victo...