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) ...

This Yellowstone National Park one day itinerary takes you to all the park's highlights including Old Faithful and Grand ...

The experiment involved custom-building a small chamber that simulated hot spring environments on early Earth.

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.

Grand Prismatic Spring, and the Grand Canyon of Yellowstone. Established in 1872, Yellowstone was the world's first national ...

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

A Wildlife Photographer of the Year captures the paradox of the park. 9 min read Michael ... More than a third of Yellowstone, including Grand Prismatic Spring, sits within the caldera of a ...