From boingboing.net:

Amateur digital photographer R. Todd King has posted a set of startlingly gorgeous photos of the snow and ice festival in Harbin, China.
“The temperature in Harbin reaches forty below zero, both farenheit and centigrade, and stays below freezing nearly half the year. The city is actually further north than notoriously cold Vladivostok, Russia, just 300 miles away. So what does one do here every winter? Hold an outdoor festival, of course!”

Below is one of his photos showing buildings made entirely out of ice, with coloured lighting inside. Unbelievably beautiful, and other-worldly.

Ice Buildings in Chinese Snow and Ice Festival