Depart from Sorrento, the native land of the Boonwurrung people, and the site of the first European settlement in 1803. Pass beneath the 20-million-year-old calcarenite cliffs of the Mornington Peninsula National Park, and in less than 15 minutes start discovering the vast Great Southern Reef beneath the water. Do some snorkeling at three different sites where you'll meet nature's finest temperate marine animals, many that exist nowhere else on Earth. See an array of colorful fish, graceful stingrays, unusual weedy seadragons, and entertaining seals. Swim freely listening to the grunts and clicks of fish working the reef and be mesmerised by the rich colours. In a swift RIB boat, travel quickly between each location, looking out for dolphin sightings as the tour explores the southern end of the peninsula.