A few weeks ago I was down in 'The Mount' on the Limestone Coast for a book event and stayed overnight with good friends. Mount Gambier is in the neck of the woods I grew up in - just a short drive from the family farm at Naracoorte, the Coonawarra wine region and the picturesque seaside town of Robe, where I spent childhood summer holidays. The region is filled with world heritage natural sites and the Mount is described as 'a city of craters, lakes and caves'. If you're planning a road trip from Adelaide to Melbourne via the spectacular Great Ocean Road, it's ...