Quad bike and sand board the worimi sand dunes the largest coastal sand dunes in the southern hemisphere this 15 hour aboriginal culture quad bike and sand board experience is only a short drive from port stephens on the new south wales north coast stopping atop the high dunes youll be provided with a 360 view of the lands and a verbal presentation of the traditional occupation and uses of the land fresh water lagoons and midden sites tool and burial sites can be spied from this vanta