Liberia the Cestos River, all of which flow into the Atlantic. The Cavalla is the longest river in the nation at . The highest point wholly within Liberia is Mount Wuteve at above sea level in the northwestern Liberia range of the West Africa Mountains and the Guinea Highlands. However, Mount Nimba near Yekepa, is higher at above sea level but is not wholly within Liberia as Nimba shares a border with Guinea and Ivory Coast and is their tallest mountain as well. Forests on the coastline are composed mostly of salt-tolerant mangrove trees, while the more sparsely populated inland has
Sub-Saharan Africa West and Central Africa), or sometimes extending from the coast of West Africa to Western Sudan. Its equivalent in Southeast Africa was "Zanj" ("Country of the Blacks"), which was situated in the vicinity of the Great Lakes region. The geographers drew an explicit ethnographic distinction between the Sudan region and its analogue Zanj, from the area to their extreme east on the Red Sea coast in the Horn of Africa. In modern-day Ethiopia and Eritrea was "Al-Habash" or Abyssinia, which was inhabited by the "Habash" or Abyssinians, who were the forebears of the Habesha. In northern Somalia was "Barbara" or