From Giant's Causeway to Terracotta Army, here reveals the world's top 10 greatest wonders that'll have you reaching for your camera. They're the great wonders of the world that every intrepid traveller must have on their wish list. The top 10 greatest wonders of the world: 1.Giant's Causeway, Northern Ireland 2.Great Rift Valley, Ethiopia 3.Great Wall of China, China 4.Hagia Sophia, Turkey 5.Kilauea, Hawaii 6.Ngorongoro Crater, Tanzania 7.Potala Palace, Tibet 8.Taj Mahal, India 9.Terracotta Army, China 10.Victoria Falls, Zimbabwe/Zambia