Mombasa suburb on the mainland which contains a beach, oil refineries, housing estates etc. Moi International Airport and the Port Reitz District Hospital are in Port Reitz. Mombasa is also a county and divided into six constituencies and thirty wards. Mombasa is a major trade centre and home to Kenya's only large seaport, the Kilindini Harbour. "Kilindini" is an old Swahili term meaning "deep". The port is so-called because the channel is naturally very deep. Kilindini Harbor is an example of a natural geographic phenomenon called a ria, formed at the end of the last glacial period when the sea level
Mombasa Island sprawl and industrial areas now occupy the rest of the island. Mombasa is linked to the mainland by the Makupa Causeway to the northwest, by the Nyali Bridge to the east and by the Likoni Ferry to the south. A road and rail bridge also serve the mainland container port near Port Reitz. Port Tudor and Tudor Creek were named by Owen Tudor the Royal Navy captain who first surveyed the area. Mombasa Island is one of the four divisions of Mombasa County. The division has a population of 146,334 (1999 census). It is divided into six subdivisions: Mombasa Island