Secret German Tunnels from World War II Discovered! | Expedition Unknown

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10 Biggest Mysteries From World War II That Have Finally Been Solved!

From submarines that went AWOL for decades, to strange blocks washing up on the beach in Florida, here are 10 mysteries from World War II that took decades to solve! Subscribe to American Eye #mysteriousdiscoveries #biggestmysteries #finallysolved #americaneye