Atoll of an atoll is very small in comparison to the total area. Atoll islands are low lying, with their elevations less than 5 meters (9). Measured by total area, Lifou (1146 km²) is the largest raised coral atoll of the world, followed by Rennell Island (660 km²). More sources however list as the largest atoll in the world in terms of land area Kiritimati, which is also a raised coral atoll (321.37 km² land area; according to other sources even 575 km²), 160 km² main lagoon, 168 km² other lagoons (according to other sources 319 km² total lagoon size). The
Addu Atoll Addu Atoll Unlike other atolls of Maldives, Addu city possesses a natural anchorage within the city basin, as the atoll is land-locked with large islands surrounding the atoll. This results in a natural harbor that is very calm and safe for sea vessels at all times, and is not affected by seasonal changes. The atoll possesses four channels which lead into the lagoon. In the north are the Kuda Kandu and Maa Kandu, in the south the Gan Kandu, and the broad Villingili Kandu is to the southeast. There are unique features in the islands of Addu Atoll. The islands