Whirli… what? Whirligig, yes that’s the name of a geyser in Yellowstone National Park. In fact, that geyser is the pool of water in the center of this image. But it was actually the runoff channel in the foreground that always draws me to this spot. Trying to find a composition where the runoff channel works well in a photo can be challenging though as it runs alongside and then under the boardwalk. Once the sun was above the distant ridge, the backlight of the steam and pool made this a much more interesting scene and one that I was happy to photograph.