Secret Uboat tunnels and caves at this former German WW2 Uboat base.
Why did Hitler order to build that ?
U boat pen part 1 :    • Hitlers Uboat pen still here. Did Hi...  
Uboat pen part 2 :    • German WW2 Uboats in secrecy. The Wo...  
Underwater explore at German WW2 Uboat pen :    • German WW2 Uboat pen explore with Fi...  

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Check out my monthly WW2 diorama giveaway videos in the beginning of each month.
Beautiful WW2 dioramas for my supporters.

Music: "Fallout" by Alexander Nakarada (www.serpentsoundstudios.com)
Licensed under Creative Commons: By Attribution 4.0 License
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Thank you Alexander :)

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My underwater exploration gear :
QYSea Fifish V6S & V6 and Fifish V6 Expert.
With a gripper to recover artifacts from the deep !
Omni directional and totally awesome for underwater exploration !
https://www.qysea.com/