Ushuaia is a resort city and the capital of Tierra del Fuego, Antártida e Islas del Atlántico Sur Province, Argentina. It is commonly regarded as the southernmost city in the world. Ushuaia is located in a wide bay on the southern coast of Isla Grande de Tierra del Fuego, bounded on the north by the Martial mountain range, and on the south by the Beagle Channel. It is the only municipality in the Department of Ushuaia, which has an area of 9,390 km2(3,625 sq mi).

It's the gateway to Antarctica cruises and tours to nearby Isla Yécapasela, known as “Penguin Island” for its penguin colonies.