Ushuaia (; ) is 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 .

Nicolas Hulot (born April 30, 1955 in Lille, France – officier de la Légion d'honneur, chevalier des Arts et Lettres) is the founder and president of the Fondation Nicolas-Hulot, an environmental group first created in 1990.