One of the smallest countries in Africa, Burundi 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 centre of Africa. The highest peak, Mount Heha at 2,685 m (8,810 ft), lies to the southeast of the largest city, Bujumbura. The most distant source of the River Nile is the Ruvyironza River in the Bururi Province of Burundi, the Nile is linked from Lake Victoria to its headwaters via the Kagera River to the Ruvyironza River. Another major lake is Lake Tanganyika, located in much of Burundi's southwestern corner. There are two national parks, Kibira National Park to the northwest (a small region of rain forest, adjacent to Nyungwe Forest National Park in Rwanda), and Ruvubu National Park to the northeast (along the Rurubu River, also known as Ruvubu or Ruvuvu). Both were established in 1982 to conserve wildlife populations. Burundi's lands are mostly agricultural or pasture.