Hamilton Island Dive & Snorkel Tours. If you're keen on exploring the reef, Hamilton Island can organize everything from PADI-accredited courses to snorkeling trips to Whitehaven Beach and local reefs, and full-day cruises to outer Great Barrier Reef pontoon Reefworld. A catamaran excursion to the outer Great Barrier Reef (A$225) allows up to four hours on the Reefworld pontoon at Hardy Reef, which is ample time for one or two dives (minimum age 12). The fare includes a buffet lunch, morning and afternoon tea, snorkelling gear, wet suits, a semisubmersible tour, and use of Reefworld's underwater viewing chamber, waterslide, and facilities. The resort also organizes thrice-weekly, full-day circumnavigations of Whitsunday Island (A$165) by rigid inflatable speedboat (RIB); during the trip you can snorkel the fringing reef off Chalkie's Beach and local coral gardens, explore Whitehaven Beach, and anchor off Hill Inlet for a trek to the summit for stupendous Whitsundays views. Hamiton Island Marina, Front St., next to general store, Hamilton Island, QLD, 4803. 07/4946–9888 Dive Shop; 07/4946–8305 Tour Bookings Desk. www.hamiltonisland.com.au.