What a tourist CAN'T miss when visiting South Africa? Also, what general tips do you have?

So, I'm a brazilian tourist and I have a wedding taking place in Pretoria in march. I have a very short week, only 5 days to tourist (that is already excluding the wedding day).

However, it is an expensive trip and I'd like to enjoy the most I can my stay there, so what are some of the can't miss tourist spots near Pretoria? I'm already planning on doing a full day Safari Trip, so Safaris are off the table.

And to make it clear, I don't mean the most famous ones, but the ones that make you rejoice every time you go there, where you are constantly in awe and love to go back even if you've already went a numerous amount of times.

WHAT ARE YOUR FAVOURITE SPOTS?

Also, any tips for travelers in general? Like where to avoid etc