For an experience that can be alternately savage and serene, plunge into the aquamarine waters of Shark Bay, Western Australia. Best known for its tourist-friendly dolphins, Shark Bay is home to a diverse population of sea life, including green and loggerhead sea turtles, dugongs, sea snakes, an outcrop of stromatolites (ancient life forms that house billions of microbes) and, of course, sharks. Since 1997, marine biologists have caught and tagged almost 400 tiger sharks in the bay. However it's the dolphins, as always, who steal the show with some truly unique and 'intelligent' behaviour.