The atoll in the Indian Ocean that is the natural habitat of the Aldabra giant tortoise is Aldabra Atoll.
Aldabra Atoll belongs to the Seychelles and lies about 1,120 kilometers southwest of Mahé. Its isolated islands contain a mosaic of grasslands, scrub, mangroves, coastal dunes, and shallow lagoons. These habitats support the world's largest population of giant tortoises, estimated at roughly 100,000 animals.
The tortoises are important ecosystem engineers. Their grazing shapes a distinctive plant community called tortoise turf, while their movements open paths and alter vegetation in ways that benefit other species. They eat grasses, leaves, stems, fruit, and occasionally carrion.
The wording can cause confusion because giant tortoises also live in the Galápagos Islands, but those are different species and lineages. Aldabra giant tortoises have also been moved to other islands and conservation facilities, yet Aldabra remains their natural stronghold. The atoll became a UNESCO World Heritage Site in 1982.