Every February for a short time in Yosemite National Park%2C sunshine strikes Horsetail Falls and creates a visual effect that resembles a waterfall on fire. Similar kinds of phenomena happen in the Grand Canyon of the Yellowstone depending upon the seasonal arc of the sun%2C weather and steam pouring out of the ground. %26quot%3BWhat marvelous hot springs lies hidden in this canyon cliff cleft revealed on this cool morning by an ephemeral tease of steam%2C%26quot%3B Fuller writes of this image. %26quot%3B Photo by Steven Fuller