Made up of 13 outer islands which form about one-third of the land mass of Seychelles, Aldabra Atoll is the world’s second largest atoll (behind Kiritimati Atoll), largest raised coral reef (7.9m/ 26ft), and home to two-thirds of the world’s giant land tortoise population (about 100,000). It is also a habitat for the coconut crab (largest land-living arthropod in the world), and the endemic Aldabra Rail (flightless bird).

It was designated a UNESCO World Heritage Site in 1982, and is run by the Seychelles Islands Foundation (SIF). Strictly a nature reserve, visitors are required to obtain authorization from the SIF.