Benin (IPA: /bə'nɪn/), officially the Republic of Benin, and also known as Benin Republic, is a country in Western Africa. It borders Togo to the west, Nigeria to the east and Burkina Faso and Niger to the north; its short coastline to the south leads to the Bight of Benin. Its capital is the Yoruba founded city of Porto Novo, but the seat of government is the Fon city of Cotonou. Benin was known as Dahomey until 1975. Stretched between the Niger River in the northeast and the Bight of Benin in the south, Benin's elevation is about the same for the entire country. Most of the population lives in the southern coastal plains, where Benin's largest cities are also located, including Porto Novo and Cotonou. The north of the country consists mostly of savanna and semi-arid highlands. Running southernly, down the middle of the country is the Oueme River. The climate in Benin is hot and humid with relatively little rain compared to other West African countries, although there are two rainy seasons (April-July and September-November). In the winter the dust winds of the harmattan can make the nights cooler. The largest city and commercial capital is Cotonou. The name Cotonou is from the Fon phrase ku tɔ nu 'at the lake of the dead', from the adjacent lagoon. This is a reference to the belief that falling stars represent the souls of those who have just died falling to the underworld. It is said that when Cotonou was founded, the lights of the lacustrine village of Ganvié across the lagoon were reflected in the waters, suggesting fallen stars at the bottom. Ganvié is a fishing village sitting in the water on stilts at the western shore of the lagoon. The town of Ouidah is the spiritual capital of Vodun, and is known locally as Glexwe. It was a major slaving port under Portuguese occupation. The town of Abomey is the old capital of the Fon kingdom of Dahomey, and the Fon king continues to reside there. In Atakora province, Betamaribe settlements straddling the Togolese border are called tata somba 'Somba houses'; they are famous for their fortifications, with livestock housed inside and the people sleeping in huts among the granaries on the roofs.