On the floor of the Gulf of Mexico sits a Nazi ship of ghosts, a sunken U-boat whose 52 crewmen died under almost a mile of water just south of the mouth of the Mississippi River.

Robot cameras dispatched by the Nautilus last week showed the distinctive outline of U-166 s conning tower and deck gun, a sight instantly recognizable even to amateur historians and World War II movie buffs. The once sinister ship now sits peacefully on the ocean floor, covered with colorful marine life.

MOBILE USERS: Click here to view the slideshow.

Click here if you d like to see more of the spectacular video shot by the Nautilus. The ship s crew also streams live feeds of its underwater explorations on this site.

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