The Midway Geyser Basin's Grand Prismatic Spring is the largest hot spring in Yellowstone and one of the ... out-and-back path that offers a great view of the spring. This area opens in late ...

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.

Yellowstone National Park is a place where steam rises from the earth and geysers erupt like clockwork. Parameters were ...

According to the Yellowstone Volcano Observatory, it’s probable that this new hydrothermal feature is connected to activity ...

The Grand Prismatic Spring is the most recognizable thermal feature of Yellowstone National Park, but some of its most fascinating features are invisible to the naked eye. Underwater exists a ...

Grand Prismatic Spring in Yellowstone National Park is the largest hot spring in North America and the third-largest in the ...

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 ...

Yellowstone’s largest hot spring. The boardwalk offers close-up views, but for the best perspective, take the short hike to the Grand Prismatic Overlook, offering stunning aerial views of its ...