Great Barrier Reef (Cairns Outer Reef)

The Great Barrier Reef is not a single reef but a 2,300-kilometer coral kingdom made up of nearly 3,000 reefs. From tropical Cairns, fast boats cross emerald inner waters to the reef chosen for the day: parrotfish graze, turtles glide and coral landscapes unfold beneath the surface. Whether this is your first snorkel or you are an experienced diver, the reef may change your idea of how lively the sea can be.