Grand Prismatic Spring ascended from a beautiful backwater spot to the second most popular destination in Yellowstone ...

Discover Yellowstone National Park, the geological crown jewel of the United States, home to the famous Grand Prismatic Spring, a natural wonder of flamboyant hues.

From hidden thermal hot spots to secret hiking trails, the park is packed with hidden wonders, and we are here to tell you ...

For more information, visit on the National Park Service's Grand Prismatic Spring page. Lower Loop Van Tour from West Yellowstone: Grand Prismatic and Old Faithful (295 reviews) ...

Editor’s Note: This story accompanies the May 2016 issue of National Geographic magazine, devoted entirely to America’s first national park. Find more at natgeo ...

It's not the geothermal geysers, bears, or bison, but this one safety concern in Yellowstone National Park claims more lives ...

How the Grand Prismatic Spring Gets Its Kaleidoscopic Colors The beating heart of Yellowstone National Park is without a doubt the Grand Prismatic Spring—the largest hot spring in the U.S.

The colors of Grand Prismatic Spring come from thermophiles ... Photograph by Michael Nichols with Ronan Donovan and the National Park Service Left: Yellowstone National Park.

Yellowstone National Park's nearly 3,500 square miles seep slightly ... the Old Faithful area is home to Old Faithful and the Grand Prismatic Spring, two of Yellowstone's most famous attractions.

Yellowstone National Park is a popular destination for geology field trips. It’s easy to see why—the dynamic landscape ...

Yellowstone's volcanic activity is waking up after 160,000 years. Learn how scientists are monitoring and preparing for ...