Spend a day snorkeling on the UNESCO-listed Ningaloo Reef and you just might spot a whale shark—the world’s largest fish (April–August). Or, you may have the opportunity to swim at a safe distance to humpback whales (September–November). Relax aboard ‘Ningaloo Blue,’ a 65-foot (20-meter), state-of-the-art vessel with comfortable seating, shade, and an observation deck. Buffet lunch, snorkel gear and wetsuit, and round-trip hotel transport from Exmouth included.