The Central African Republic is a landlocked country in central Africa. It borders Chad in the north, Sudan on the east, the Republic of the Congo and the Democratic Republic of the Congo on the south, and Cameroon on the west. Most of the CAR consists of Sudano-Guinean savannas but it also includes a Sahelo-Sudanese zone in the north and an Equatorial forest zone in the south. Two thirds of the country lies in the basins of the Ubangi river, which flows south into the Congo River, while the remaining third lies in the basin of the Shari river, which flows north into Lake Chad.