The best way to explore the lower South Island is by car, particularly if you want to take your time seeing the Catlins. You cannot ferry your rental car to Stewart Island; there is secure parking in Invercargill and Bluff. Buses serve most places of interest, including daily routes between South Island cities. They go the direct route between Dunedin and Invercargill on State Highway 1. If you are driving and want to see the Catlins, leave State Highway 1 at Balclutha and take the well-marked Southern Scenic Route.