National Geographic has some amazing video here (embedded video auto-start alert) of the sinking of the cruise ship MS Explorer, the first cruise ship ever built specifically to operate in the Southern Ocean near Antarctica; she also became the first cruise ship to sink there after striking an object, probably ice (you think?) near the South Shetland Islands on November 23.
The Liberian-registered ship was operated by GAP Adventures, which issued a statement that the ship was not sunk by an iceberg, but by pack ice, which is probably important to somebody, but damned if I could tell the difference anywhere but in my Johnnie Walker.
All 154 passengers and crew of the Explorer were rescued by a coordinated effort of the Argentine Coast Guard and the Chilean Navy.
Image: MS Explorer in 2005, by Constantine via Wikipedia.