TheRepublic of the Congo, also known as theCongo Republic,orCongo-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.