Cruise to the Goolwa Barrage, through the lock and into the Coorong National Park to view the mouth of the River Murray. From the mouth the cruise heads into the pristine waters of the Coorong, past the spectacular white sand dunes and bird life, as your captain provides an informative and entertaining commentary on the passing scenes. Disembark for a guided walk through the sand dunes of the Younghusband Peninsula to the undisturbed white sandy beaches of the Great Southern Ocean. Along the walk your guide will talk about the cockling industry here, the sand dune flora and fauna and how the Aboriginal people lived in the area. On return to the boat, cruise further into the Coorong to see another of the barrages that separate the Coorong from Lake Alexandrina. Your captain will explain the man-made barrage and lock system that extends along the River Murray and tell you of the associated benefits and environmental impacts.