Imposing Concrete Hideout is Where Nazi U-Boats Were Once Built ⛴ WWII by Drone | Smithsonian
Description:
This imposing concrete structure in the German city of Bremen is 1400 feet long, 300 feet wide and 90 feet high, and looks every inch the secret Nazi facility that it is. Its purpose was to build and test U-Boats. #WWIIbyDrone #SmithsonianChannel Paramount+ is here! Stream all your favorite shows now on Paramount+. Try it FREE at https://bit.ly/3qyOeOf Subscribe to The Smithsonian Channel: https://bit.ly/2UNavJO Twitter: https://bit.ly/33lH712 Instagram: https://bit.ly/3iw9Iay Facebook: https://bit.ly/3kkVOZp
Video Duration:
4 min 11 sec
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