Atoll remains of an ancient atoll as a hill in a limestone area is called a reef knoll. The second largest atoll by dry land area is Aldabra with 155 km². The largest atoll in terms of island numbers is Huvadhu Atoll in the south of the Maldives with 255 islands. In 1842, Charles Darwin explained the creation of coral atolls in the southern Pacific Ocean based upon observations made during a five-year voyage aboard from 1831 to 1836. Accepted as basically correct, his explanation involved considering that several tropical island types—from high volcanic island, through barrier reef island, to atoll—represented
Kaafu Atoll of the Kaafu Atoll administrative division and are part of the separate Malé City administrative division. Please see the Malé for these islands. Resort islands are classified as Uninhabited Islands which have been converted to become resorts. Practically all uninhabited islands in Malé Atoll became tourist resorts during the two final decades of the 20th century. The following are the resort islands, with the official name of the resort. Kaafu Atoll Kaafu Atoll is the code name given to an administrative division in the Republic of Maldives which consists of the geographical atolls of Kaashidhoo Island, Gaafaru, North Malé Atoll