Grand Prismatic Spring, Midway Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Pool runoff of orange bacteria and algae (Therophiles), Grand Prismatic Pool, Midway Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Grand Prismatic Spring, Midway Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Grand Prismatic Spring and Excelsior Pool behind, Midway Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Grand Prismatic Spring, Midway Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Grand Prismatic Spring in Yellowstone National Park, United States

Grand Prismatic Spring, Yellowstone National Park, Wyoming, United States of America

Grand Prismatic Spring, Yellowstone National Park, Wyoming, United States of America

Grand Prismatic Spring, Yellowstone Nationalpark, Wyoming, USA, United States of America

Grand Prismatic Spring, Yellowstone National Park, Wyoming, United States of America

Grand Prismatic Spring, Yellowstone National Park, Wyoming, United States of America

Grand Prismatic Spring, Yellowstone National Park, Wyoming, United States of America

Grand Prismatic Spring, a bright turquoise pool and site of geothermal activity, with mineral rich deposits at the edge, Grand Prismatic Spring, Yellowstone National Park, Wyoming