When Alaska and Hawaii gained statehood in 1959, the era of the incorporated territory ended -- except in one place. A tiny Pacific island called Palmyra Atoll has, for the past 55 years, been America's last incorporated territory.
Never heard of Sealand? That's not a surprise. It's a concrete dot in the North Sea roughly the size of two tennis courts, and it's never been recognized by any other nation on Earth. But that never bothered its eccentric founder, Paddy Roy Bates.