Driving in South Africa is not a big deal, even if you are not used to drive on the left side of the road. Outside of the bigger cities, there is less traffic and there is a good chance to see anyone for hours. Endless roads cut through some beautiful scenarios. But be careful, speed limits are often controlled and speeding charged.
I was very impressed with the coast line in the south and more than once I had to stop and enjoy the gorgeous view. In Hermanus, I had observed the humpbacks performing their mating rituals from the shore. At Boulders Beach in Simon's Town one can walk through colonies of African penguins, once called "Jackass" penguins, and watch their activities.
If you love caves, you should visit the spectacular underground wonder of Klein Karoo, the Cango Cave, a mere 29km from Oudtshoorn, at the head of the picturesque Cango Valley. Situated in a limestone ridge parallel to Swartberg Mountains, you will find the finest dripstone caverns, with their vast halls and towering formations.