The country is called "Africa in miniature" for its geological and cultural diversity. Natural features include beaches, deserts, mountains, rainforests, and savannas. The highest point is Mount Cameroon in the southwest, and the largest cities are Douala, Yaoundé, and Garoua. Cameroon is home to over 200 different linguistic groups. The country is well known for its native styles of music, particularly makossa and bikutsi, and for its successful national football team. French and English are the official languages.Tourist literature describes Cameroon as "Africa in miniature" because it exhibits all major climates and vegetation of the continent: coast, desert, mountains, rainforest, and savanna.[48] The country's neighbours are Nigeria to the west; Chad to the northeast; the Central African Republic to the east; and Equatorial Guinea, Gabon, and the Republic of the Congo to the south.An irregular chain of mountains, hills, and plateaus known as the Cameroon range extends from Mount Cameroon on the coast—Cameroon's highest point at 4,095 metres (13,435 ft)[54]—almost to Lake Chad at Cameroon's northern border at 13°05'N. This region has a mild climate, particularly on the Western High Plateau, although rainfall is high. Its soils are among Cameroon's most fertile, especially around volcanic Mount Cameroon.[54] Volcanism here has created crater lakes. On 21 August 1986, one of these, Lake Nyos, belched carbon dioxide and killed between 1,700 and 2,000 people.[55] This area has been delineated by the World Wildlife Fund as the Cameroonian Highlands forests ecoregion.