You've probably seen amazing pics of ice festivals in colder countries, but the recent cold snap meant that one could be held at London's Natural History Museum.
The chainsaws and chisels were out in full force as amazing sculptures were formed out of ice.
There were teams from the UK, Bulgaria, France, Italy and Holland.
They worked over the weekend in chilling conditions forming pieces based on the festival's theme - Wildlife in the City - out of ice.
Five two-tonne blocks of ice were carved into works of art.
After the weekend's hard work, the judges decided the team from Holland were the winners. They won a glass trophy.