Pulau Maratua, Berau
It is the biggest island in Derawan Islands. It has one resort and a small airport. It has many caves that connected to the sea. Stingless jellyfish on its lagoon is even more dense compare to Danau Kakaban. Its shore is a home for green sea turtle and hawksbill sea turtle.
Surrounding the island there are many dive spots. We can meet many pelagic on this spot such as hammerhead shark, manta ray, eagle ray, barracuda and tuna.