Some of the creations are based on buildings from around the world - from spectacular city skyscrapers to elegant temples.
Recognise this familiar face? It's a frozen recreation of artist Florentijn Hofman's giant rubber duck which has been snapped floating past the world's most famous cities.
Organisers say more than a million people visited last year's ice city and they're expecting more guests this year.
The ice festival usually lasts for more than a month - but that depends on the weather! In a few weeks the sculptures will melt and the ice city will disappear until next year.
When darkness falls the ice sculptures are illuminated in bright colours. Visitors can walk through glowing ice streets and even slip down a 240-metre-long ice slide.
Visitors are braving temperatures as low as -29C to see the yearly display of snow and ice sculptures in Harbin city.
It may be ice-cold but this frozen face is giving visitors a warm welcome at a snow sculpture show in China.
More than 10,000 people built the ice and snow structures in just 15 days. They're pretty impressive during the day, but something spectacular happens at night...
