Saint Helena is a volcanic tropical island in the South Atlantic Ocean, 4,000 kilometres east of Rio de Janeiro and 1,950 kilometres west of the Cunene River, which marks the border between Namibia and Angola in southwestern Africa. It is part of the British Overseas Territory of Saint Helena, Ascension and Tristan da Cunha. Saint Helena measures about 16 by 8 kilometres and has a population of 4,534 (2016 census). It was named after Saint Helena of Constantinople.
It is one of the most remote islands in the world, and was uninhabited when discovered by the Portuguese in 1502. It was an important stopover for ships sailing to Europe from Asia and South Africa for centuries. Saint Helena is Britain's second-oldest remaining overseas territory after Bermuda.
Description by Wikipedia