Guinea is divided into four main landform regions which include the coastal lowlands, the Guinea Highlands and the mountainous central core, the eastern savannah and the forested jungle regions in the far-southeast.
The country's mountains (running northwest through southeast) are the source for the Niger, the Gambia, and Senegal Rivers, as well as the numerous rivers flowing to the sea on the west side of those same mountains that stretch into Sierra Leone and the Ivory Coast.
The Niger River, the third-longest river in Africa, extends about 2,600 mi (4,180 km). Its source is in the Guinea Highlands in southeastern Guinea.
Guinea's highest point is Mont Nimba at 5,748 ft (1,752 m); its lowest, the Atlantic Ocean.