5 most dangerous prisons from history...
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Presenting 5 of the worst jails, dungeons, and prison sites from world history - including the Mongolian coffin box, the ancient Roman Mamertine located in Rome's sewers, the HMS Jersey prison hulk, Andersonville, Georgia, and the worst vacation in the world at the Hanoi Hilton in Vietnam.
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Intro: "The Machine Thinks"
by Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 3.0
Dark5 is a curated repository of documentary knowledge featuring the darkest, strangest, weirdest, scariest and most amazing of science, science fiction, history, technology and horror. Within you'll encounter paranormal top 5 lists including the most mysterious photos that cannot be explained, mysterious creatures caught on tape, secret conspiracies, unexplained videos, aliens, UFOs and the creepiest monsters real and imagined.