The heat of the Grand Prismatic Spring makes it home to a rainbow of bacteria. Here, the sunlight reflecting off of the blue and orange water illuminates the steam.
Two visitors to the Grand Prismatic Spring walk along the boardwalk suspended over the steaming hot spring waters.
A thick billow of steam rising from the volcanically heated water in the Grand Prismatic Spring area envelops a small rock formation that, if you squint, almost looks like a distant and mysterious island in the tropics.
