Ushuaia is the capital of Tierra del Fuego, Antártida e Islas del Atlántico Sur Province, Argentina, and the southernmost city of the country. Ushuaia claims the title of world's southernmost city.

It was founded on October 12, 1884, by Augusto Lasserre and is located on the shores of the Beagle Channel surrounded by the mountain range of the Martial Glacier, in the Bay of Ushuaia. Besides being an administrative center, it is a light industrial port and tourist hub. Ushuaia is located roughly 1,100 kilometres (680 mi) from the coast of Antarctica.

The word Ushuaia comes from the Yaghan language: ush and waia ("bay" or "cove") and means "deep bay" or "bay to background".

Ushuaia features a significantly ocean-moderated mild tundra climate; bordering on a subpolar oceanic climate, with both extremely mild winters and summers (average temperature remains above 0 °C and below 10 °C year round).

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