Mysteries of the Abandoned

Florida Doomsday Castle (6x5)

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A strange bunker near the Kennedy Space Center once served a top-secret military function should doomsday ever come; experts use declassified intel to reveal the purpose of this forbidding facility. Stories: 1) Christianstadt Dynamite Factory, Krzystkowice, Poland; 2) AT&T Bunker, Florida, USA; 3) Coastal Forts, Gold Coast, Ghana; 4) The Sugar Refinery, Belgrade, Serbia