The Christian Science Monitor has a brilliant photoset about underwater archaeology. The picture above is:
The wreck of the British Merchant Navy ship, SS Thistlegorm, sunk in 1941, is seen beneath the Red Sea. The ship is now a well-known dive site.
Where I work they have the full blueprints of the Regalskeppet Vasa on the wall in the conference room, which has never seemed like the best choice of ship to me…
Underwater Archaeology [CSMonitor]