Hi KNK
There are a number of caches where you can drop your Travel bug in the city area. Some I recommend are:
Lions Head: About 1.5 hour walk up lions head, right in city centre, Excellent views.
Zulu 7 : Not as strenous as mentioned in cache description. Can be done in 30 minutes total, and close to famous Kirstenbosch gardens.
Constantia Forest: If you are renting a car, this is close to city centre, and a 5 minute walk from car.
Sandy Bay – Cape Town: This is close to famous nude beach (now frequented mainly by naked guys :-(, but quick easy walk, with a great coastal drive thrown in.
Sentinel View: One of my favourite Caches, and the first ever in SA. Magnificent views. Slightly longer drive from city centre (45 min) and reasonably tiring walk (about 1.5 hours.
Jonkershoek: I haven't done this one, but i beleive it is a nice easy cache, in the Stellenbosch winelands area. If you drop the TB here, I will be sure to rush to get it. I do love to find them, and we need more of them around here.
Cheers - Enjoy your visit and happy caching!
Discombob