The country lies on a rolling plateau in the center of Africa. The average elevation of the central plateau is , with lower elevations at the borders. The highest peak, Mount Heha at , is southeast of Bujumbura. The source of the Nile River is in Burundi province. It is linked from Lake Victoria to its headwaters by the Ruvyironza River. Lake Victoria is also an important water source. It serves as a fork to the Kagera River. Another major lake is Lake Tanganyika in Burundi's southwestern corner.