At 947,303 square kilometres (365,756 sq mi), Tanzania is the 13th largest country in Africa and the 31st largest in the world, ranked between the larger Egypt and smaller Nigeria. It borders Kenya and Uganda to the north; Rwanda, Burundi, and the Democratic Republic of the Congo to the west; and Zambia, Malawi, and Mozambique to the south. Tanzania is located on the eastern coast of Africa and has an Indian Ocean coastline approximately 1,424 kilometres (885 mi) long. It also incorporates several offshore islands, including Unguja (Zanzibar), Pemba, and Mafia. The country is the site of Africa's highest and lowest points: Mount Kilimanjaro, at 5,895 metres (19,341 ft) above sea level, and the floor of Lake Tanganyika, at 352 metres (1,155 ft) below sea level, respectively.
Tanzania is mountainous and densely forested in the northeast, where Mount Kilimanjaro is located. Three of Africa's Great Lakes are partly within Tanzania. To the north and west lie Lake Victoria, Africa's largest lake, and Lake Tanganyika, the continent's deepest lake, known for its unique species of fish. To the southwest lies Lake Nyasa. Central Tanzania is a large plateau, with plains and arable land. The eastern shore is hot and humid, with the Zanzibar Archipelago just offshore.
The Kalambo water falls in the southwestern region of Rukwa are the second highest uninterrupted fall in Africa and are located near the southeastern shore of Lake Tanganyika on the border with Zambia. The Menai Bay Conservation Area is Zanzibar's largest marine protected area.
Climate varies greatly within Tanzania. In the highlands, temperatures range between 10 and 20 °C (50 and 68 °F) during cold and hot seasons respectively. The rest of the country has temperatures rarely falling lower than 20 °C (68 °F). The hottest period extends between November and February (25–31 °C or 77.0–87.8 °F) while the coldest period occurs between May and August (15–20 °C or 59–68 °F). Annual temperature is 20 °C (68.0 °F). The climate is cool in high mountainous regions.
Tanzania has two major rainfall regimes: one is uni-modal (October–April) and the other is bi-modal (October–December and March–May). The former is experienced in southern, central, and western parts of the country, and the latter is found in the north from Lake Victoria extending east to the coast. The bi-modal regime is caused by the seasonal migration of the Intertropical Convergence Zone.
Wildlife and conservation
Approximately 38 percent of Tanzania's land area is set aside in protected areas for conservation. Tanzania has 16 national parks, plus a variety of game and forest reserves, including the Ngorongoro Conservation Area. In western Tanzania, Gombe Stream National Park is the site of Jane Goodall's ongoing study of chimpanzee behaviour, which started in 1960.
Tanzania is highly biodiverse and contains a wide variety of animal habitats. On Tanzania's Serengeti plain, white-bearded wildebeest (Connochaetes taurinus mearnsi) and other bovids participate in a large-scale annual migration. Tanzania is home to about 130 amphibian and over 275 reptile species, many of them strictly endemic and included in the International Union for Conservation of Nature's Red Lists of countries.