Pegatina Tristan da Cunha coat of arms, British Overseas

Tristan da Cunha (/ˌtrɪstən də ˈkuːn(j)ə/), colloquially Tristan, is a remote group of volcanic islands in the South Atlantic Ocean. It is one of three constituent parts of the British Overseas Territory of Saint Helena, Ascension and Tristan da Cunha, with its own constitution. The territory consists of the inhabited island Tristan da Cunha, which has a diameter of roughly 11 kilometres (6.8 mi) and an area of 98 square kilometres (38 sq mi); the wildlife reserves of Gough Island and Inaccessible Island; and the smaller, uninhabited Nightingale Islands. As of October 2018, the main island had 250 permanent inhabitants, who all carry British Overseas Territories citizenship. The other islands are uninhabited, except for the South African personnel of a weather station on Gough Island. As there is no airstrip on the island, the only way of travelling to or from Tristan is by ship. There are six-day journeys from Cape Town, South Africa, and some cruises offered departing from Ushuaia, Argentina.