Durban is the largest city in the South African province of KwaZulu-Natal and the third largest city in South Africa. It forms part of the eThekwini metropolitan municipality. Durban is famous for being the busiest port in South Africa. It is also seen as one of the major centres of tourism because of the city's warm subtropical climate and extensive beaches. The municipality, which includes neighbouring towns, has a population of almost 3.5 million, making the combined municipality the biggest city on the east coast of the African continent. The metropolitan land area of 2,292 square kilometres (885 sq mi) is comparatively larger than other South African cities, resulting in a somewhat lower population density of 1,513 /km2 (3,920 /sq mi).