USS Nautilus (SSN-571) is the world's first operational nuclear-powered submarine. She was the first vessel to complete a submerged transit beneath the North Pole on August 3, 1958. Namesake of the submarine in Jules Verne's Twenty Thousand Leagues Under the Sea, and named after another USS Nautilus (SS-168) that served with distinction in World War II, Nautilus was authorized in 1951 and launched in 1954. Because her nuclear propulsion allowed her to remain submerged for far longer than diesel-electric submarines, she broke many records in her first years of operation and was able to travel to locations previously beyond the limits of submarines. In operation, she revealed a number of limitations in her design and construction; this information was used to improve subsequent submarines.

The Nautilus was decommissioned in 1980 and designated a National Historic Landmark in 1982. She has been preserved as a museum of submarine history in Groton, Connecticut, where she receives some 250,000 visitors a year.