Explore the fiery breath of the Earth through Yellowstone's iconic geysers, colorful hot springs, and other mesmerizing thermal features.
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Half the World's Geysers in One Park
This series, Yellowstone's Steaming Heart, explores the geothermal wonders that make this park one of the most volcanically active places on Earth.
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1
Old Faithful Keeps Its Own Schedule
Old Faithful earned its name not because it's the largest or most powerful geyser, but because it's remarkably predictable.
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2
Grand Prismatic's Colors Are Alive
The Grand Prismatic Spring stretches nearly three hundred feet across, making it the third-largest hot spring on Earth.
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3
Where Caves Build Themselves Outside
Mammoth Hot Springs is essentially a limestone cave flipped inside out.
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4
Yellowstone's Hottest and Nastiest Features
Fumaroles register the highest surface temperatures of any hydrothermal feature in Yellowstone, sometimes exceeding two hundred degrees Celsius.
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Steamboat Geyser Defies All Predictions
Steamboat Geyser can blast water over three hundred feet into the air, making it the tallest active geyser on the planet.
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