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

Old Faithful is one of the biggest icons of Yellowstone National Park! Truly, it is the world's most famous geyser and a ...

Grand Prismatic Spring is a highlight of any visit to Yellowstone National Park! The largest hot spring in the park, the ...

Tina Bergozini, general manager of the Grand Valley Water Users Association, speaks about lining canals and other methods to reduce the amount of salt washing into the Colorado River during a tour ...

State officials may have solved the puzzle of how zebra mussels got into the Colorado River.

Fire officials say it has become a “megafire” on the North Rim of the Grand Canyon, burning so hot that it is creating “fire clouds” with their own erratic weather systems.

Senator Mark Kelly visited the Grand Canyon as he continues asking questions about the Dragon Bravo Fire that has become one of the largest wildfires in Arizona history.

Trove of Fossils Uncovered in the Grand Canyon Offers a Rare Glimpse Into Cambrian Life, With Toothy Worms and Slug-Like Mollusks Rocks found along the Colorado River in Arizona turned out to ...

The Dragon Bravo Fire has continued to wreak havoc across the Grand Canyon region in Arizona, but one famous piece of American history is still intact, at least somewhat. The statue of Brighty the ...

She finds artistic inspiration in the epic landscapes of the Grand Canyon. ♪ (boat engine humming) She’s also a biologist studying the Colorado River’s unique fish community for the USGS.

The Dragon Bravo Fire that destroyed the North Rim lodge will affect visitors and nearby communities. Here's the Canyon's financial impact on Arizona.

GRAND CANYON NATIONAL PARK, Ariz. -- Democratic Gov. Katie Hobbs toured the destruction left by a wildfire along the Grand Canyon's North Rim, on Saturday, surveying what she described as ...