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Underground Bootleggers From the networks of the Shanghai tunnels, where men were sold into slavery on the high seas, to the hidden dens of opium runner and the sly speakeasies of Prohibition, Portland, Oregon was one of the world’s most dangerous ports. Beneath today’s city streets still lie remnants of slave tunnels, fight clubs, gambling dens, and an ingenious modern water system that literally keeps the city from drowning in its own filth. Rome: The Rise The Roman Empire was the most powerful in history, and pieces of this epic civilization can be found beneath virtually every street in Rome. How did Roman society achieve its greatness? From entire underground neighborhoods to sophisticated aqueducts, remnants of the great Roman Empire lie hidden in subterranean streets.
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