I had planned to learn to scuba dive and explore the Great Barrier Reef from below its blue waters. However, after the mandatory medical exam, it seemed my mostly inactive asthma would keep me looking at the Reef from topside its waves. This ended up not holding me back from enjoying this once in a lifetime trip. While my friends learned to dive, I was spending extra days in the rain forest, and while they were diving I was snorkeling. The reef was still amazing from the water's surface and full of schools of bright fish and sea turtles to swim with. If you too are deemed unable to scuba dive, I would still highly recommend joining a three-day dive trip and snorkeling each chance you get!