A fog bow, sometimes called a white rainbow, is a similar phenomenon to a rainbow; however, as its name suggests, it appears as a bow in fog rather than rain.
Location: Coronado Islands (Islas Coronado), Baja California, Mexico
Image ID: 38578
White Dome Geyser, with a faint rainbow visible in its mist, rises to a height of 30 feet or more, and typically erupts with an interval of 15 to 30 minutes. It is located along Firehole Lake Drive.
Location: Lower Geyser Basin, Yellowstone National Park, Wyoming
Image ID: 13541