Man and dog watching a geyser erupt in Yellowstone National Park - Mario Tama/Getty Images Yellowstone National Park is considered a national treasure. Not only is it the first national park ever ...

Two years after a dramatic explosion in Yellowstone's Biscuit Basin, a new geyser shot up near Black Diamond Pool.

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.

Home to more than 2.2 million acres, hundreds of geysers and waterfalls, as well as Yellowstone Lake – the largest ...

Around 465 active geysers are roiling across Yellowstone National Park at any given time, with new ones regularly bubbling to ...

Three years after its last eruption, Ledge geyser in Yellowstone National Park roared back to life April 28. Ledge is the second-largest geyser in Norris Geyser Basin, after Steamboat. What it lacks ...

A boy was sent to the hospital and treated for burns after breaking through the thin crust above thermal water. A 17-year-old tourist visiting Lone Star Geyser in Yellowstone National Park suffered ...

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.