Rwanda, formerly Ruanda, officially the Republic of Rwanda, is a country in Central Africa and one of the smallest countries on the African mainland, and its capital city is Kigali. Located a few degrees south of the Equator, Rwanda is bordered by Uganda, Tanzania, Burundi, and the Democratic Republic of the Congo. Rwanda is in the African Great Lakes region and is highly elevated; its geography is dominated by mountains in the west and savanna to the east, with numerous lakes throughout the country. The climate is temperate to subtropical, with two rainy seasons and two dry seasons each year. Rwanda has a population of over 12.6 million living on 26,338 sq. km of land, and therefore it is the most densely populated mainland African country.