The UNESCO World Heritage Site of the Great Barrier Reef is a must-see attraction in Australia. To make the most of your vacation, consider taking a fun-filled day cruise to the Great Barrier Reef. A marine biologist guide will join you on the tour, providing informative commentary about the local marine life that you might not otherwise learn about. You'll have the flexibility to choose your preferred activity option, whether it's snorkeling, scuba diving, or taking a glass-bottom boat tour.