An airplane that can go virtually anywhere, do anything, and operate in the most extreme weather—and that could sell for twice what you paid for it after 30 years—might sound like a fantasy. But the iconic DHC-6 Twin Otter, which de Havilland Canada produced, fits that description. It helped launch the commuter and regional airline industry in North America, remains the backbone of maritime coastal patrols for many navies, and serves the mining and oil industries worldwide. It lands on wheels, big tundra tires, straight floats, amphibious floats, and skis. Runways are optional. Nice flat surfaces of any kind are kid stuff. When it’s 60 below in Antarctica and some scientist needs to be medevaced, this is the airplane they send.