Imposing Concrete Hideout is Where Nazi U-Boats Were Once Built ⛴ WWII by Drone | Smithsonian

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 bit.ly/3qyOeOf
Subscribe to The Smithsonian Channel: bit.ly/2UNavJO
Twitter: bit.ly/33lH712
Instagram: bit.ly/3iw9Iay
Facebook: bit.ly/3kkVOZp