America’s First National ParkYellowstone National Park holds the title of being America's first national park, and it was ...

The impressive part is seeing this geyser come to life as it can send water 200 feet into the air! Average temperature: 196 ...

Yellowstone's magma system shows new activity, with the northeast sector possibly hosting future volcanic activity.

Catherine Parker Old Faithful may be Yellowstone's most well-known geyser, but the Norris Geyser Basin is home to the park's oldest (thermal features are said to have been present here for more ...

Lightning strikes above the Fan and Mortar geysers in Yellowstone's Upper Geyser Basin. Geysers are formed when underground water meets superheated rock and blasts back out through a narrow hole.

Yellowstone National Park is noted for the geothermal marvels, but it is the threat below ground that holds the attention. Events such as the Black Diamond Pool explosion and current seismic activity ...

As with most Yellowstone geysers, Excelsior activity is sporadic and unpredictable. And also spectacular. As Stan Lee would say, “Excelsior!” ...