Yellowstone National Park's many thermal features have captured the imagination of visitors for centuries. But Yellowstone geologists and other researchers are using an array of high-tech tools and techniques for the first time to get a much more revealing look at the park's large-scale hydrothermal systems in action.

Any of these three parks is a great place to meet the Southern Mountains—but a visit to each or all is an even better way to meet the diverse and distinctive resident wildlife that populates the dense forests of the Southern Appalachians.

Two weeks after a climbing ranger died during a rescue attempt at Mount Rainier National Park, his body was recovered Thursday from the snow-heavy mountain in Washington state.

The National Park Service just announced today it will expand bicycle access in parks nationwide.