When you're staying in Cape Town, be sure to get out to Hout Bay on the Cape Peninsula to witness a sunset that I'm convinced is the most beautiful one I've ever seen.
I love the Chapman's Peak Hotel in Hout Bay. Even if you're staying in Cape Town, it can be a great place to drive to—park your rental car and take off on a hike or bike ride up the gloriously winding Chapman's Peak Drive. Bring those headlamps or bike lights since you're sticking around for sunset! Then on your return back to Hout Bay, have dinner and some local South African Pinotage on the deck of the hotel's restaurant.
Chapman's Peak is the name of a mountain on the western side of the peninsula, about 15 kilometers south of Cape Town. Chapman's Peak Drive hugs the near-vertical face of the mountain from Hout Bay to Noordhoek, and will leave you amazed. In the 1920s this was seen as a major feat of engineering. After several historical road closures due to safety issues, it's been reengineered and reopened as a toll road, much to the delight of motorists, cyclists, and hikers.