Tourists ignored warning signs and walked onto Yellowstone's Grand Prismatic Spring, risking burns and damaging one of America's most famous thermal features.
A Yellowstone visitor appeared to taste dangerous thermal water, sparking disbelief and another reminder why Yellowstone hot springs should never be touched.
Fur was flying when tourists in Yellowstone National Park were trying to observe one of the park's iconic animals, from a safe distance, only to have their viewing disrupted.
Montana, Glacier National Park, Yellowstone National Park and travel costs are making headlines as a new ranking reveals America's most expensive national park vacations.