Grand Prismatic Spring, Midway Geyser Basin, Yellowstone National Park, Teton County, Wyoming

The Grand Prismatic Spring is a huge heated to over 70 ° C located in the Yellowstone National Park water basin.

It is the largest hot spring known in the United States and the third largest globally. This is one of the most popular tourist attractions of the National Park, with Mammoth Hot Springs and Old Faithful.