Every year one of China's most remarkable events takes place in the city of Harbin half way between the North Pole and equator. For five months of the year the mercury rarely hovers above zero. But if you live in Harbin you've got to love winter. The Harbin Ice and Snow Festival features three of the world's most astonishing attractions - Zhaolin Park the home of ice art, Sun Island the home of the snow expo and Ice and Snow World the biggest winter theme park on the planet. Get an inside look as Harbin's army of workers build a theme park bigger than Disneyland and follow some of the world's best ice and snow carvers in their gruelling quest for gold.