The hook
One of the most beautifully sited cities on earth, wrapped around a flat-topped mountain that drops to the sea, where you can ride a cable car above the clouds in the morning and swim off a white beach in the afternoon.
01Why it's worth it
Cape Town's setting is simply extraordinary: the great sandstone wall of Table Mountain rises straight above the city, its summit reached by a rotating cable car or a stiff hike, with the whole peninsula, two oceans, and the city bowl spread below. From there the land runs south down a spectacular coast, past the penguins of Boulders Beach and the fynbos-covered cliffs to the Cape of Good Hope, and north to the winelands. The city itself mixes the buzzing V&A Waterfront, the pastel Bo-Kaap Muslim quarter, Camps Bay's beaches, and a serious food and wine scene, against the sobering history embodied in Robben Island, where Nelson Mandela was imprisoned. It is a place of dramatic beauty and stark inequality both, and, like much of South Africa, calls for normal city-safety awareness. Few cities reward a visit so richly.
02How to experience it
Do Table Mountain on a clear, still morning (check the cableway is running), and drive the Cape Peninsula to Boulders' penguins and Cape Point. Take the ferry to Robben Island for the history. Balance the Waterfront with the Bo-Kaap, the beaches, and a winelands day trip; keep normal urban wits about you.
From the locals
The most useful description of Cape Town in the r/travel South Africa thread came from someone born and raised there, and it is notable for how little of it is about the landmarks. Table Mountain is the last item on their list, not the first. Ahead of it: "great wine, vineyards, walking in nature at places like Jonkershoek, Newlands Forest, Constantia Forest, great restaurants and nightlife, walk on the promenade, enjoy great coffee in the city center, walk the muslim quarter in Bo Kaap, eat fish in Hout Bay, walk alongside zebra and baboons at Cape Point."
Two things follow from that. The forests on the city's doorstep are a local habit rather than a tourist itinerary, and worth copying. And the climate framing is theirs too — "the Western Cape is pretty Mediterranean, temperate, windy" — which is the polite local way of saying the wind is a genuine factor in when you visit.