One of the smallest countries in Africa, Burundi is landlocked and has an equatorial climate. Burundi is a part of the Albertine Rift, the western extension of the East African Rift. The country lies on a rolling plateau in the center of Africa. The average elevation of the central plateau is 5,600 feet (1,707 m), with lower elevations at the borders. The highest peak, Mount Heha at 8,810 feet (2,685 m), lies to the southeast of the capital, Bujumbura. The source of the Nile River is in Burundi province, and is linked from Lake Victoria to its headwaters via the Ruvyironza River. Lake Victoria is also an important water source, which serves as a fork to the Kagera River. Another major lake is Lake Tanganyika, located in much of Burundi's southwestern corner.