Derawan, Sangalaki, Maratua, and Kakaban are all part of the Sangalaki marine heritage park, which includes one of the world's only saltwater lakes and one of Indonesia's largest green turtle nesting areas. These paradise islands are located within the renowned Coral Triangle off the north coast of East Kalimantan, which have all of the richness and beauty that one would expect from such a location within its fascinating underwater landscapes.