This image was taken at an elevation of 9,000 ft in Colorado. I was hiking early in the morning across a meadow in the foothills of the Wet Mountain when I noticed tiny ice crystals at the entrances of several small animal caves. I assume that these incredible ice formations were formed by the moisture in the breath of mice, chipmunks or ground squirrels and other rodents living in these small caves. And the hard frost - it was about 4 degrees Fahrenheit when I took this photo - turned their breath instantly into these stunning pieces of ice art along the opening of the cave entrance. Macro does it: The size of the entire area captured in this image is less than one inch (!) and each of the crystal formation is smaller than a pea.