8Gansbaai, South Africa

Known as the “Great White Shark Capital of the World,” Gansbaai’s beaches in South Africa are notorious for their high concentration of these predators.

Just offshore is Shark Alley, a narrow channel between Geyser Rock and Dyer Island, which is home to a colony of 60,000 seals—a favorite food for great white sharks. Shark cage diving is a popular activity here, but for those who dare to swim or surf, Gansbaai’s waters can be deadly due to the constant threat of shark attacks.