No trip to Oz is complete without a visit to the world's largest coral reef system, spread out over some 900 islands off the Queensland coast, with key destinations including Cairns, Fitzroy Island, Green Island, Hamilton Island, Townville, and the Whitsunday Islands. During the summer months the water is warm and clear, making it the perfect time to snorkel or scuba dive among the colorful fish and corals. You can also take a glass-bottom boat tour or go on a helicopter ride for an eye-popping bird's eye view. Don't forget to learn about the reef's conservation efforts and how you can help protect this fragile ecosystem.

Read more in Tripatini contributor Calida Jenkins´ post 6 Top Musts of Australia.