Guinée forestière (Forested Guinea) is a forested mountainous region in southeastern Guinea, extending into northeastern Sierra Leone. It is one of four natural regions into which Guinea is divided and covers 23% of the country. It includes all of the Nzérékoré administrative region, and shares a border with Sierra Leone and Liberia. Its rocky topology contains several mountain ranges and has an average elevation of 460m. Forested Guinea contains important areas of biological diversity such as the UNESCO World Heritage site Mount Nimba Strict Nature Reserve and biosphere reserve Ziama Massif. The Guéckédou prefectures also recorded the initial case of the 2014 Ebola outbreak in Meliandou, a rural village. The virus subsequently spread to urban areas and neighbouring countries Sierra Leone and Liberia.