On the Sunday morning we visited the Lion Park, which is located between Jo'Burg and Pretoria. We used the same tour company that took us to Jo'Burg and Soweto, even though we found that the entry fees were only R70 vs R390 that we were charged. We all considered that it was worth it to not have to worry about getting there, fuel etc etc.

Here's more info, if you're interested: http://www.joburg.org.za/2004/dec/dec23_lions.stm