Geyser Hill is a group of thermal features ... Planning a National Park vacation? America the Beautiful/National Park Pass ...

Yellowstone National Park is noted for the geothermal marvels, but it is the threat below ground that holds the attention.

Editor’s Note: This story accompanies the May 2016 issue of National Geographic magazine, devoted entirely to America’s first ... above the Fan and Mortar geysers in Yellowstone's Upper ...

Keep in mind, biking isn't permitted on the boardwalks near the geysers. – Catherine Parker More than its star attraction (Old Faithful), the Upper Geyser Basin boasts not only the largest ...

Home to Yellowstone's Grand Prismatic Spring, the Midway Geyser Basin leaves visitors in awe of its rainbow-colored pools and powerful geyser. In addition to the Grand Prismatic Spring ...