This submarine was sunk off the coast of Cape Hatteras, North Carolina.  Yes, you read that right, a German U-boat sunk in US waters.  Very interesting read (and it’s not the only U-boat to get over to US waters, either and there may be more as well!).

Inside a sunken WW2-era Russian sub.

Nice little vid on the Bismarck.

I have a book about this ship, but it’s been ages since I last read it.  Of interesting note is that Bismarck’s stern is still missing.

http://www.bismarck-class.dk/bismarck/wreck/bismarck_wreck_5.html

The picture of the partial Swastika on the deck shows where the stern used to be.

WW2 Japanese tank found in cave.