South of the Catlins National Park, you can find the southernmost point of the South Island of New Zealand (there is a small island belonging to the country further south). Its possible to reach by road, but without tarmac it's more difficult. After leaving the car in the car park, walking from this point takes around 15 minutes. Definitely worth a detour from the main route to get here.
This is the best place if you want a good view of the town of Wanaka and its lake without requiring much physical effort. This hill is in the same town and can be reached by car to the top, the ride does not take more than 10 minutes from the center of town. This is a good place to watch the sunset.