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Nazi Megastructures
S01 E03 / U-BOAT BASE
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EP 01
THE ATLANTIC WALL
EP 02
V2 ROCKET BASES
EP 03
U-BOAT BASE
EP 04
SUPER TANKS
EP 05
HITLER'S JET CAVES
EP 06
FORTRESS BERLIN
U-BOAT BASEThis episode describes the immense and impenetrable concrete and steel submarine pens that the Nazis built to protect their precious and deadly U-boats from Allied attacks.
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