and pools next to Old Faithful Geyser in Yellowstone's Upper Geyser Basin. Geyser Hill is a must for any Yellowstone visitor.

For most of the year, Yellowstone National Park is flooded with visitors ... Key attractions to visit during this time ...

This story appears in the December 2016 issue of National Geographic magazine. Become a member of National Geographic to explore more incredible images and stories from our archives. The star of ...

Lightning strikes above the Fan and Mortar geysers in Yellowstone's Upper Geyser Basin ... green is chlorophyll they use to absorb sunlight. Old Faithful throws a tower of steam into a moonlit ...

Catherine Parker More than its star attraction (Old Faithful), the Upper Geyser Basin boasts not only the largest concentration of geysers in the park, but also in the entire world (Yellowstone is ...

Old Faithful erupts more frequently than any of the other big geysers, although it is not the largest or most regular geyser in the park. Its average interval between eruptions is about 76 minutes ...

“I refer to these people as my Yellowstone family.” Every two years, this tightknit group gets together for a reunion at the inn, a century-old log hotel, which is located a stone’s throw from Old ...

Before packing your bags and making the trek to the north west U.S., here are some things to keep in mind when visiting Yellowstone in the winter. It will be a relief to know that the famous geyser ...

Smithsonian American Art Museum Rainbow over the Grand Canyon of the Yellowstone Smithsonian American Art Museum Old Faithful Geyser, Yellowstone National Park Smithsonian American Art Museum Hymen ...

100 Spring Plain in Norris Geyser Basin, Yellowstone National Park. The area is frequently flooded and impassable. (Courtesy of Lauren Harrison) Cinder Pool. Elk Pool. Hydrophane Springs.

U.S. News Insider Tip: Escape the crowds directly in front of Old Faithful and enjoy ... Catherine Parker This world-renowned geyser is a must-see for every Yellowstone visitor.