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
British West Africa colonial banking often disadvantaged the colonies as producers of commodities. Even after its final dissolution, a single currency, the British West African pound, was in effect throughout the region—including Nigeria—from 1907 to 1962. Nigeria gained independence in 1960. Sierra Leone was self-governing by 1958 and gained independence in 1961. Gambia gained independence in 1965. In 1954, the British Gold Coast was allowed by Britain to self-govern and in 1957, the Gold Coast was given independence from Britain, under the name Ghana. British West Africa British West Africa was the collective name for British colonies in West Africa during the colonial