Aldabra

"Located in the Indian Ocean, the Aldabra Atoll is an outstanding example of a raised coral atoll. Due to its remoteness and inaccessibility, the atoll has remained largely untouched by humans for the majority of its existence. Aldabra is one of the largest atolls in the world, and contains one of the most important natural habitats for studying evolutionary and ecological processes. It is home to the largest giant tortoise population in the world. The richness and diversity of the ocean and landscapes result in an array of colours and formations that contribute to the atoll's scenic and aesthetic appeal. The combination of unique geomorphology, high biodiversity and intact ecological processes found at Aldabra Atoll contributed to its designation as Special Reserve in 1981 and its inscription as a UNESCO World Heritage Site in 1982" - Management Plan for Aldabra Atoll.