Yellowstone is one of the oldest and most stunning national parks in the U.S., with countless sights and activities that ...

Right now there’s a tree frozen up in the wilderness outside of Yellowstone National Park with names scrawled into the trunk.

An iconic apex predator appeared through thick fog like an apparition and cautiously watched a photographer in Yellowstone National Park, stunning video shows. Bo Welden, the wildlife guide who ...

In the Arizona desert, researchers are learning so much more about the peoples who have inhabited this land since antiquity ...