Nazi Megastructures

U-Boat Base

Series 1 - Episode 2 U-Boat Base

Thu 30 Nov 1pm - 2pm National Geographic Channel
See Repeats
Fri 1 Dec, 4am - 5am National Geographic Channel
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Summary

A look at the concrete submarine pens built by the Nazis to protect their U-boats from allied bombs. The impenetrable safe havens were so huge and strong that they still survive today.
Education