The Bunaken National Marine Park lies in the bay of Manado, in the north of Sulawesi. It encompasses five islands (Bunaken, Siladen, Manado Tua, Mantehage, Nain) where you do mostly steep wall diving and here you have a good chance to see pelagic like sharks, mackerels and tunas as well marine turtle. The walls are very nicely covered with corals and have small caves and overhangs.