Trip Reports - JNB, NBO, CPT

I am leaving for Frankfurt on short notice and have my heart on visiting Africa while there. Since I am leaving in two days, I will not have time to read up on where to visit. My choices are JNB, CPT or NBO. Which would any of you suggest. I will be in Frankfurt for 3 days of pure work, have 4 days off to travel, and will return for 3 more days in FRA, then come home.

Thank you in advance for recommendations.

JS

If you don't have much advance info, I would choose CPT. Might be a bit chilly!

JNB as a city is no treat but you can get to places like Kruger National Park from JNB very easily. Very reasonable (say cheap) accommodations and easy access by car.

Car rentals can be expensive if not done in advance on the web.