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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Music: “Dark and Hard Dubstep or Metal Soundtrack” by Nivanoise

Intro: "The Machine Thinks"
by Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 3.0
http://creativecommons.org/licenses/by/3.0/