Biodiversity is rich, with a seemingly endless variety of fish big and small.

Turtles are especially abundant, and it is common to see more than 10 on each dive.

Blackwater diving, a night dive in the pitch black sea, reveals weird and wonderful sea creatures.

The choice place to stay is the award-winning Bunaken Oasis Dive Resort and Spa.

An undeniable highlight is the chance to see wild dolphins. Boats from Bunaken bring tourists mere centimetres from them.

Lucky visitors might even find themselves in the middle of a super pod of hundreds of dolphins.