Yellowstone National Park's nearly 3,500 square miles seep slightly across state borders into Montana and Idaho, but its major attractions are contained in the northwest corner of Wyoming.

Yellowstone is at the top of the list as one of the most essential American experiences you should try when visiting the US. It’s no wonder why the national park is one of the most visited.

Scientists are tracking changes at the giant supervolcano that lies under Yellowstone National Park ... more precise maps of the large reservoirs of magma under the park shows large pods of ...