"Cold and dark" would ordinarily imply dingy and scary, but cold and dark concrete parking garages are great in our summer months. Instead of parking out in the street, paying ~R10 per hour, and returning to a blazing-hot car, rather hunt down one of the underground parkades - like this one below Thibault Square. It normally works out cheaper and you get to return to a car that's absorbed the cool basement air. :)