Green Island Great Barrier Reef Tours are one of the most popular things to do whilst in Cairns. Only 45 minutes from Cairns, this tropical Island is a beautiful coral cay on Australia’s Great Barrier Reef with unique island rainforests, surrounded by white sandy beaches & magnificent coral reefs and abundant marine life. Choose to snorkel, dive, stay dry or view the spectacular underwater reefs in semi submarine or glass bottom boat, or simply laze on the white sandy beach.