We were taking a walk in the afternoon to some less-visited places in Yellowstone when we came upon this hot springs. The brilliant color of the pool echoed the blue overhead – and the steam rising off the water almost seemed to be creating the clouds in the sky.
This image is all about composition. I composed the photo so that the edge of the pool was near the edge of the frame. That way, I could fill half the frame with sky and the other half with the deep blue pool. Even lighting made the exposure fairly simple.