The Republic of the Congo, also known as the Congo Republic, or Congo-Brazzaville, is a central African nation with rain forest reserves that are habitats for gorillas. Most of the inland is tropical rain forest, drained by tributaries of the Congo River. Parc National Nouabalé-Ndoki and Parc National d'Odzala are two of the most pristine forest reserves on the continent and between them they are arguably the highlight of the whole of Central Africa.