Chile’s Puerto Williams and Argentina’s Ushuaia continually arm wrestle over which is the southernmost spot in the world. The answer lies in your interpretation of “spot.” If you think it means city, yes to Ushuaia. But if you think town or settlement is correct, Puerto Williams, a village of 2,800, wears that more intimate crown (though Chile officially designated it as a city in 2019). And what a crown to wear.