Part of one of the hot spring formations at Mammoth Hot Springs, Yellowstone National Park, Wyoming, US. Taken on 12 September 2012, the second day of our week's trip from Calgary down to Grand Teton National Park. Not sure if this is part of Palette Spring, but this wonderful mix of natural colours would fit perfectly into the name. Bacteria and algae create the streaks of color, forming tapestries of living colour.