Bathyscaphe Trieste
On 23 January 1960, she reached the ocean floor in the Challenger Deep (the deepest southern part of the Mariana Trench), carrying Jacques Piccard and Don Walsh. This was the first time a vessel, manned or unmanned, had reached the deepest known point of the Earth's oceans. The onboard systems indicated a depth of , although this was revised later to ; fairly recently, more accurate measurements have found Challenger Deep to be between and deep.
Antarctic Peninsula
The grounding of the Argentine ship "Bahía Paraíso" and subsequent oil spill occurred near the Antarctic Peninsula in 1989. In 2005, Lewis Gordon Pugh broke the farthest-south long distance swim record by undertaking a swim at Petermann Island off the Antarctic Peninsula. In November 2007, the "MV Explorer" rammed submerged sea ice and then sank after water from a fist sized hole could not be pumped out quickly enough. All passengers and crew were safely evacuated and rescued.