This is an extraordinary expedition for travelers who love the natural world and all its wonders. Located in the heart of the Indian Ocean, the 115 islands that make up the Seychelles are known for crystal-clear waters, endless stretches of powdery white-sand beaches, a diverse and vibrant marine ecosystem, and a range of unique plant and animal species. Start in Mahé, the largest island, then cruise to the Outer Islands, Alphonse group, and Aldabra, home to giant tortoises. Continue to Madagascar, a thousand-mile island boasting an impressive variety of spectacular landscapes, from pristine coral reefs and coastal mangroves to virgin rainforests and native groves of Baobab trees. Geographically isolated for millions of years, nearly all of Madagascar’s animals and plants are found nowhere else on Earth, including nearly 100 varieties of lemurs. Explore the best marine reserves and national parks from the comfortable Island Sky, all accentuated by a robust set of lectures from an outstanding team of experts.