Where does the Congo rainforest meet savanna grasslands?

The Congo rainforest in the central depression of the Congo basin extends continuously from approximately 4° N to 5° S latitude. This dense, evergreen forest is bordered on both its northern and southern sides by belts of savanna (grassy parkland).12

Rather than meeting at a sharp, defined line, the forest and savanna often blend together imperceptibly, creating a mosaic pattern where the two vegetation types intermingle. In some instances, strips of forest may extend into the grassland. As one moves farther away from the Equator, the transition continues until the landscape reaches the wooded savanna region, which is characterized by thinner deciduous forest.12