Visa required to visit downtown Hong Kong?

Yes, you can go to the downtown area for a visit. If you hold South African passport, you enjoy 30 days free stay there. You need to spare at least 4 hours for getting back from the downtown area and boarding the plane. So you actuall just have around 7 hours for a visit. I think you might go to the Victoria Peak for a visit. You can take airport express line to Hong Kong Station. A round-trip costs HKD 180. Then you can catch a taxi to the cable car terminal. It costs around HKD 20 to 30. The cable car costs HKD40 for a round trip. When you reach the peak, you can have a grand view of the whole HK if weather is good. Besides, you can visit Madame Tussauds if you like. It costs HKD245.