Atoll Atoll An atoll (, , , , or ), sometimes called a coral atoll, is a ring-shaped coral reef including a coral rim that encircles a lagoon partially or completely. There may be coral islands or cays on the rim. The coral of the atoll often sits atop the rim of an extinct seamount or volcano which has eroded or subsided partially beneath the water. The lagoon forms over the volcanic crater or caldera while the higher rim remains above water(s) or at shallow depths that permit the coral to grow and form the reefs. For the atoll to persist,
Baa Atoll and the Galápagos Islands. Voavah is the first island designated by UNESCO as an exclusive use island. The island is owned by the Four seasons company and is available for hire. The islands coordinate's are 5.31652 73.07797. The island is also known as Hafnas. Baa Atoll Baa Atoll (includes Southern Maalhosmadulu Atoll or Maalhosmadulu Dhekunuburi, Fasdhūtherē Atoll, and Goifulhafehendhu Atoll) is an administrative division of the Maldives. It consists of three separate natural atolls, namely southern Maalhosmadulu Atoll (which is 42 km long and 32 km wide and consists of 9 inhabited islands), the Fasdūtherē Atoll (wedged in between the