Indoor, controlled shark dive at the Two Oceans Aquarium in Cape Town's V&A Waterfront, reached through the aquarium dive school. Qualified divers enter a calm tank with ragged-tooth sharks, rays, turtles, yellowtail, grouper, and mullet. Book ahead, arrive for the briefing, and treat it as a weather-proof aquarium session rather than an open-water site. If you have not dived in months, plan for a refresher.