[Daily Photo] Opal pool in Midway Geyser Basin, Yellowstone

This photo of Opal pool was taken at Midway Geyser Basin of Yellowstone National Park. It was the first day of our Yellowstone journey. We started from Grant Village to Norris. I had to call it "the day of geysers". It felt like I had seen all the geysers in my life in one day.