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
Felidhu Atoll Felidhu Atoll Felidhu Atoll is a natural atoll of the Maldives. It is the smallest administrative atoll in terms of population. This atoll is located from the capital Malé, 90 minutes by speedboat and 5 hours by slow boat. The Vaavu Atoll administrative division includes two geographical atolls; Felidhu Atoll and the small egg-shaped Vattaru Reef, which has only one little islet and is in diameter. The easternmost geographical point of the Maldives is located at Foiytheyo Muli, close to Foiytheyobodufushi Island. This is thought to be the least visited island in the whole of Maldives being at the far