Maratua Island, located in the Derawan Archipelago, off the north coast of East Kalimantan, has lately risen even more in popularity as more and more tourists visit this island ever since regular charter flights have been operated from China to Tarakan in North Kalimantan. From here tourists take a speedboat right to these spellbinding islands. Among the cluster of islands in Derawan, the island of Maratua stands out for its singular beauty. Maratua is a large tropical island partially encircling a massive lagoon on one end and fringed with sheer rocky walls and coral reefs along the other end. This giant upside down U-shaped island covers about 384 square kilometers of sandy white beaches and mangrove forests and 3,735 square km of territorial waters which scientists believe contain the third highest level of marine biodiversity in the world after Raja Ampat and the Solomon Islands.