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Maratua Island is located in the province of East Kalimantan and one of the four most popular islands in the Derawan Archipelago. This giant U-shaped island, is home to one of the world’s only saltwater lakes, as well as one of the largest green turtle nesting sites in Indonesia. Situated within the legendary Coral Triangle, Maratua’s underwater landscape exhibits an abundance of colorful coral reefs populated with various species of fish, green turtles, manta rays and other marine life. These territorial waters contain the third highest level of marine biodiversity in the world.