The Blue Pond in Hokkaido
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http://www.spoon-tamago.com/2013/11/13/the-blue-pond-in-hokkaido-changes-colors-depending-on-the-weather/
If you’re a Mac user you may be familiar with the “Blue Pond” located in the town of Biei, Hokkaido.
The OS X Mountain Lion wallpaper, as well as these images you can see at Spoon & Tamago below, were all photographed by Ken Shiraishi. According to the photographer, the water contains a high degree of aluminum hydroxide, which reflects blue light.
Shiraishi spent several days up there late in 2013 photographing the pond in various light. See the incredible results below!