The Midway Geyser Basin's Grand Prismatic Spring is the largest hot spring in Yellowstone and one of the largest hot springs in the world. Measuring approximately 370 feet in size and around 121 ...

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.

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 ...

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 ...

Then turn right at the Grand Prismatic Spring Overlook shortly after ... Check out all of the top things to do in the park. Yellowstone Facts - Learn more about the unique features of Yellowstone.

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

While a one-day visit can showcase the highlights, a 3-day Yellowstone itinerary is ideal for most travelers, encapsulating top sights like Old Faithful, Grand Prismatic Spring, and the Grand ...