Goshiki numa, Urabandai Fukushima

Goshiki Lake frozen over
Originally uploaded by Shenanigans in Japan

These "5 colored lakes" (although only white in winter) were formed only a bit over 100 years ago by the Mt Bandai volcano in the left background when it exploded and changed all the landscape around it. In warmer months its a beautiful place with lots of huge Koi fish swimming around and lovely emerald blue/green kind of water.