4Gansbaai – South Africa

While Gansbaai Beach is an aquatic playground, it is also home to what is known as Shark Alley. Enough said. (Why so many sharks? Every April-September, the waters welcome some 60,000 sea lions to feast on.).

There is one way to still enjoy the waters of Gansbaai though: by partaking in a shark-cage diving expedition to get up-close-and-personal with these sea creatures from the safety of an iron cage.