Australia's 19 World Heritage wonders: what makes them so special? | The Insight Files |

What does the Great Barrier Reef have in common with the Great Wall of China, the Great Smoky Mountains National Park and the ruins of Great Zimbabwe? All four of these places - and over a thousand others mostly without the word 'great' in their titles - are on UNESCO's World Heritage Site. NSW has six, Victoria just one. So what are Australia's 19 World Heritage sites and why are they important?