The Great Wall doubles as a long ice slide; just sit and go. You can pick up some serious speed and wipe out spectacularly at the bottom if you're wearing a slick coat, but you won't go anywhere if you're wearing corduroy pants.
A view from atop that structure, looking back on a Russian-styled building and a mock Great Wall, both constructed out of ice. Making it to the top of this structure is an accomplishment in itself - imagine walking up a stairway of solid ice for two floors with no handrails. The yellow block wall on the right and the balconywork on the lower left are all ice, with no internal support structure - just lights.
An overview of the ice festival from atop the Great Wall of ice. It's like a Disney theme park, with multiple attractions and food hawkers and kids running around and people lined up for bathrooms. The only differences are that the temperature is about a hundred degrees colder than the typical Disney park, and all the structures are made out of ice rather than plastic - and slipping and falling here doesn't result in tremendous lawsuits
An entire ship constructed of ice, with passengers onboard. Though it might not be seaworthy, the ship would certainly float - after all, it's made of ice. Hundreds of years ago during the Manchu days of ice lantern art, the sculptures were lit only by candles.
There are a couple more pictures, which I neglected to save.