Each year, the small South Australian town of Whyalla becomes home to one of the most spectacular underwater events: the spawning of the giant Australian cuttlefish. First broadcast in 1954 ...

Here are 15 must-see natural wonders the world over ... (Getty Images)| Ayers Rock, located in Australia's Uluru-Kata Tjuta National Park, is a giant rock that stands more than 986 feet high.