There is a famous underground Nazi Germany research facility, which name escapes me at the moment, where they did strange experiments. As the Nazis were leaving they apparently left all of the research in the place, but detonated explosives on the way out, thus sealing all of the technology in there. The tunnels had flooded over the years making it almost impossible to get into.
So, when I see this I think that once the tunnels are reopened we will find armies of the undead. Nazi soldiers ready to fight for thier furher until the end of time.
hmmm sounds like the plot of a great movie if ever I heard one.