The wind picked up while we were on the boardwalk at Grand Prismatic Spring in Yellowstone causing ripples to cover the surface of the brightly colored Opal Pool. The springs and pools in the Midway Geyer Basin are brighter and more vivid in the summer months but in winter, the colors still pop. With a normal temperature of 132°F, Opal Pool doesn’t freeze over and its colorful bacterial mats decorate its edges. White snow surrounding the pool creates an other worldly scene that is breathtaking to see.