Yellowstone National Park is considered a national treasure. Not only is it the first national park ever established anywhere in the world, it's also filled with an amazing array of natural features.

This archived news story is available only for your personal, non-commercial use. Information in the story may be outdated or superseded by additional information. Reading or replaying the story in ...

The world’s largest acidic geyser in Yellowstone National Park is erupting again after a six-year slumber. The Echinus Geyser, situated in the Norris Geyser Basin, last erupted in December 2020.

WASHINGTON — Yellowstone's Echinus Geyser, which is the largest acidic geyser in the world, came out of five years of dormancy last month to start erupting several times a day, according to the U.S.

The world’s largest acidic geyser has begun erupting again in Yellowstone after slumbering for over five years, the national park said Monday. Echinus Geyser, located in the back basin of the Norris ...