Location of Saint Helena Island

class="apple-converted-space"> Quatro de Fevereiro Airport of Angola's capital Luanda. The island is associated with two other isolated islands in southern Atlantic, also British territories — Ascension Island about 1,300 kilometres (810 mi) to the due northwest in more equatorial waters and Tristan da Cunha, which is well outside the tropics 2,430 kilometres (1,510 mi) to the south. The island is situated in the Western Hemisphere and has the same longitude  as  Cornwall in the United Kingdom.

The island of Saint Helena has a total area of 122 km (47 sq mi), and is composed largely of rugged terrain of volcanic origin (the last volcanic eruptions occurred roughly 7 million years ago). The centre is covered by forest, of which some has been planted, including the Millennium Forest project. The highland areas contain most of the island's endemic flora, fauna, insects and birds. The coastal areas are barren, covered in volcanic rock and are warmer and drier than the centre of the island. There are no native land mammals on Saint Helena, but rabbits, rats and mice have been introduced, as well as feral cats and dogs. Much of the island has been identified by