What is the hottest geyser in Yellowstone?

1. Norris Geyser Basin, Yellowstone. This tallest geyser in the world set the highest temperature ever recorded in the park. It's so far above sea level that the boiling point is 199°F rather than the sea-level 212°, but a hole drilled by scientists to 1,087 feet deep found a temperature of 459°F.



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Photograph of the Old Faithful Geyser erupting in Yellowstone National Park. Waters from Old Faithful contain arsenic concentrations of about 1,500 µg/L. Arsenic is a geogenic, or naturally occurring, chemical element in surface- and groundwaters that is of great public-health concern.

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The Boiling River is one of only a few hot springs in Yellowstone National Park for swimming.

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Over 20 people have died after falling into Yellowstone's hot springs, or after having become severely burned after touching one. The park's hot springs are one of the park's most dangerous features. However, deaths are still an incredibly rare event.

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