September 6, South to Port Fairy My next stop was at the town of Mount Gambier which sits on the side of a volcano. Inside the crater is the Blue Lake where, for reasons scientists are unable to explain, the water changes color according to the season. After a short visit I continued down toward the coast. At Port Fairy I met my tour guide, Noel, in the Tower Hill nature reserve. "You'll see many animals if you're quiet," he said. He was right. I saw koalas, emus and kangaroos.