4) Ultimately, the main reason people visit Cairns is to go to the Great Barrier Reef, which I did through a one day tour.
Minus the feeling of seasickness on the way out, it was a great experience. I did an intro dive on the reef and then spent the rest of the day snorkeling. Having never dived before, I really enjoyed it as you take for granted the silence that comes with being underwater and really do feel like you are in a different world. Plus the variety and colors of the fish you see are great -I didn't rent an underwater camera so have none to share at this point :(, though know there will be more opportunities.