This episode features Old Joliet Prison, a battered facility near Chicago that hosted the Blues Brothers; Tito's Nuclear Bunker, Keelung Fortifications and Vilarinho de Furna Campo Do Geres.A dilapidated facility near Chicago that descended into open war but then hosted an iconic pop-culture moment; a vast underground base in Bosnia, saved by an act of sabotage, committed by a double agent; an ancient Portuguese settlement crushed under a wave of change, now emerging from the mud like a modern-day Atlantis; and a fortress city in Taiwan that a famed Chinese commander used to trap his French enemy and turn into their coffin.

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Documentary