A study suggests ancient hot springs, like Yellowstone's, may have supported reactions crucial for the birth of life on our ...

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) ...

Vandalism is a huge problem at US National Parks ... while causing environmental damage. Grand Prismatic, the most famous geothermal spring at Yellowstone is uniquely vulnerable, and its colorful ...

The beating heart of Yellowstone National Park is without a doubt the Grand Prismatic Spring—the largest hot spring in the U.S. Its colorful bands are the product of hardy bacteria and algae ...

Editor’s Note: This story accompanies the May 2016 issue of National Geographic magazine, devoted entirely to America’s first national park ... The colors of Grand Prismatic Spring come ...

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.

Find the best things to do in Yellowstone National Park so you can easily plan your vacation. From geysers to waterfalls, don ...

Their images helped influence Congress to make Yellowstone the first National Park. Smithsonian American Art Museum Rainbow over the Grand Canyon of the Yellowstone Smithsonian American Art Museum Old ...