The team attempts to prove if a tunnel exists behind a unique formation of rocks they believe is a secret backdoor entrance into the mountain. See more in Season 1, Episode 6, "Nazi Concrete."

#LostGoldOfWWII

Subscribe to Military Heroes, Presented by History, for more great shows and specials:
https://histv.co/MilitaryHeroes

Check out exclusive The HISTORY Channel content:
History Newsletter - https://histv.co/newsletter
Website - https://histv.co/History
Facebook - https://histv.co/Facebook
Twitter - https://histv.co/Twitter

Uncover the events that shifted the course of history, and the heroes who changed our world. Military Heroes, Powered by History, is the ultimate channel for military history from the ancient to the declassified.