Grand Prismatic Spring
Midway Geyser Basin, Yellowstone National Park, Wyoming, USA
Note: This view of Grand Prismatic Spring is from the trail that leads to Fairy Falls.
Grand Prismatic Spring maintains a warm 147-188°F temperature, and is the largest hot spring in Yellowstone. It is the third largest hot spring in the world - New Zealand has the world's two largest hot springs. The blue steam coming from Excelsior Geyser can be seen in the background.