Two days ago I posted a photo of the Grand Prismatic Spring. This is a photo of the water running off the spring and into the Firehole River. The amazing color is usually hidden by steam, but just enough wind was blowing last might to reveal this wonderful site. I had to use a telephoto lens since I had to photograph this from across the river. I shot this after the sun had set and the lack of light required a multi second exposure, that is why the water is so smooth and milky. I aso used a polarizer filter to help remove any glare from the wet rocks – this helps bring out the rich colors. The final result was a pleasant surprise.