Diving Halmahera... The remote province of Halmahera is about as far north in Indonesia as you can go. And it's isolation means that it offers some pretty unique diving opportunities. Big currents are however very much a feature of Halmahera... As the area sits right in the path of the Indonesia Throughflow as it makes it's way through the vast archipelago. Diving Halmahera - Where Is It? The starfish-shaped island of Halmahera is located in the north of the Indonesian archipelago. Right in between North Sulawesi and Raja Ampat and straight north from Ambon. It is the largest island in the province of North Maluku and also one of the …