Southern Right Whale, South Africa, 2003Photograph by David DoubiletOff South Africa, a southern right whale Eubalaena australis takes a peek above water before heading back down to the depths. Photographer David Doubilet rates the South African coast as one of the world's top seven diving spots. "When the sardines run, they bring seals, dolphins, and other predators," he writes. "To me, this is the most exciting dive in the world."