USS Nautilus Passes Under the North Pole
USS Nautilus, the world’s first nuclear submarine, went under the Arctic ice and became the first vessel to pass beneath the North Pole, crossing from the Pacific to the Atlantic under the ice.

U.S. Navy · Public domain · Source
Launched in 1954, Nautilus was the first submarine able to run submerged for weeks without surfacing, powered by a nuclear reactor. Its name was handed down from earlier US Navy ships, though everyone thought of the submarine in Twenty Thousand Leagues Under the Seas. Leaving Hawaii in July 1958, it passed through the Bering Strait and dived under the ice near Point Barrow, north of Alaska.
At 11.15 p.m. on 3 August its commander, William Anderson, announced: “North Pole.” After nearly 96 hours and about 2,900 km beneath the ice, Nautilus emerged in the sea east of Greenland — the first vessel to cross the Arctic from the Pacific to the Atlantic.