Mammoth Hot Springs 3 – Mammoth Hot Springs is one of the iconic thermal features in Yellowstone National Park. From year to year, subtle changes can be seen in the structure of the spring. From day to day the hot spring gives a different feel depending on the atmospheric conditions. This image was captured on a warm and bright day. With the warm air temperature and low relative humidity, there was very little visible water vapor rising off the feature to obscure or blur the image.