Yellowstone National Park is full of natural wonders, and visitors this week can count snow rollers among them.
The park on Tuesday shared an image showing what it described as “nature’s snowballs,” or snow rollers, adorning a slope between Mammoth and the Norris Geyser Basin.
Snow rollers are formed, according to the park, “when the right amount of snow, wind, temperature, and moisture come together to form a snowball or doughnut shape.”
