Yellowstone National Park contains the world’s largest concentration of geothermal features. In fact, this is the primary reason it was set aside as a national park in 1872.

When Yellowstone was discovered, it was thought to be so unique it had to be preserved. It was actually guarded by the U.S.

Research reveals that a geological feature has prevented a catastrophic eruption at America's most popular National Park ...

These 30 photos showcase the most mind-blowingly gorgeous, almost unreal places our world has to offer. Bolivia’s Salar de ...

A grizzly bear’s claws usually come in handy for digging up roots, squirrels and insects for a tasty meal. But after getting ...

The bear was killed by park staff in Yellowstone last week because it posed a risk to public safety, the park said in a news ...

She pleaded guilty to violating a state statute requiring “all foot travel in thermal areas of Yellowstone National Park (to) ...

Formed over thousands of years of erosion caused by hydrothermal activity, water and other natural forces, the Grand Canyon of the Yellowstone is the primary attraction in the Canyon Village area ...

Yellowstone is one of the largest national parks in the U.S. and draws millions of visitors each year. It is home to the iconic geyser Old Faithful and has wolves, bison and more than 50 other ...

BOISE, Idaho — Idaho police on Friday released the names of six people from China, Italy and California killed when a pickup truck collided with their tour van in a fiery crash near ...