The Whitsundays section of the Great Barrier Reef offers stunning reefs for snorkeling and diving. The area is a UNESCO World Heritage Site home to over 1500 species of fish and 400 types of coral. Tours depart from Airlie Beach and Hamilton Island to various reef sites including Hardy Reef with its famous Heart Reef. Full-day tours start from AUD 260 including snorkeling equipment and lunch. Cruise Whitsundays operates pontoon-based reef experiences for easy access.