On opposite ends of the Earth, Longyearbyen, Norway, the northernmost city in the world, and Ushuaia, Argentina, the southernmost, mirror each other in remarkable ways. They both exist at the very edge of human civilization, surrounded by endless icy wilderness. But they also boast startling individual quirks and oddities.

The former experiences polar nights and midnight sun while the latter experiences all four seasons in a single day. One has extreme cold, while the other has extreme wind. One is the gateway to 90 percent of Antarctica cruises; the other is the gateway to Arctic adventures. One started as a coal mining colony, the other as a penal colony for Argentina’s most dangerous criminals. Ushuaia is literally the end of the road as the southernmost point of the Pan American Hig

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