Tanzania is the largest country in East Africa and the global centre of the Great Wildebeest Migration, a continuous 800-kilometre calving and survival circuit. It contains both the highest point in Africa, Mount Kilimanjaro, and the deepest lake on the continent, Lake Tanganyika. With over 32% of its territory legally protected within national parks and reserves, Tanzania maintains the highest concentration of large mammals per square kilometre on Earth, anchored by completely intact prehistoric volcanic ecosystems.