Green Island National Park, Coral cay national park in Queensland, Australia.

Green Island National Park protects a 12-hectare coral cay 27 kilometers offshore from Cairns, formed over thousands of years from sand and coral rubble piled on the sheltered side of a platform reef. The cay is covered in tropical vine forest, and a 1.3-kilometer paved walking track crosses it.

The Gungganyji Aboriginal people used the island as an initiation ground before European contact. In 1770 Lieutenant James Cook charted it as "a low green woody island" and named it after Charles Green, his ship's astronomer. In 1857 the first of many beche-de-mer fishing stations was set up here, and in 1928 the region's first regular ferry service began.

The Gungganyji Aboriginal people call the island Dabuukji and used it as an initiation ground. The name and that use are recorded for the cay; the island is now a national park and a resort visited by ferries from Cairns.

Boats leave Cairns daily for the island, and a 1.3-kilometre paved walking track crosses it, with picnic areas, telephones and toilets provided. Camping is not permitted; the only accommodation is a small resort served by the ferries. Bring sun protection for the open crossing and the walk.

Green Island is a true coral cay, built over thousands of years from sand and coral rubble piled on the sheltered side of a platform reef. The first of many beche-de-mer fishing stations was set up here in 1857, and the region's first regular ferry service began in 1928.