Tristan da Cunha is a remote volcanic group of islands in the south Atlantic Ocean, and also the name of the main island of that group. It is the most remote inhabited archipelago in the world, lying 2,816 kilometres (1,750 mi) from the nearest land, South Africa, and 3,360 kilometres (2,090 mi) from South America. It is part of the British overseas territory of Saint Helena, Ascension and Tristan da Cunha which also includes Saint Helena 2,430 kilometres (1,510 mi) to its north, and equatorial Ascension Island even farther removed, grouping the British South Atlantic islands into one far-flung centrally administered aggregate. Tristan da Cunha is said to be the most remote inhabited location on Earth. It has a population of 275 (2009 figures).