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
Vaavu Atoll Vaavu Atoll Vaavu Atoll is an administrative division of the Maldives comprising the natural atolls of Felidhu Atoll and the Vattaru Reef. It is the smallest administrative atoll in terms of population. This atoll is located 40 miles from capital Malé, 60 minutes by speedboat and 3 hours by dhoni. The Vaavu Atoll administrative division includes two geographical atolls; Felidhu Atoll and the small egg-shaped Vattaru Reef, which has only one little islet, Vattaru and is 9 kilometers in diameter. The easternmost geographical point of the Maldives is located at Fottheyo Muli, close to Foththeyo-bodufushi Island. No remains from the