From the Gladstone Marina, head to Heron Island. This will take you about two hours. The Heron island is popular for its epic outdoor and water adventures and the scenic views are much talked about. So, jot down this amazing island on your list of places to visit. The Heron Island Jetty is the place where you'll start your snorkelling and diving excursions. You can spot reef sharks, manta rays and stingrays here. There are two options from which you can choose if you are an avid snorkeler. You can either snorkel from the island or hire a boat and go on a deep-sea snorkelling session close by. That's not all. If you're travelling between the months of January and March, you can marvel at some baby turtles. This is the hatching season, and you'll have plenty to witness.