Yellowstone National Park has more potential hazards than the thermal pools. Bear and bison have also injured or killed visitors.

A 60-year-old woman suffered second- and third-degree burns to her lower leg this week while walking off-trail in Yellowstone National Park, officials said.

A woman suffered burns on her leg after hiking off-trail in Yellowstone National Park and falling into scalding water in a thermal area near the Old Faithful geyser, park officials said.

The 60-year-old woman, who has not been named, was near the Old Faithful Geyser at the Wyoming national park this week when she stepped through a thin crust over scalding water, park officials said.

A New Hampshire woman suffered burns on her leg after hiking off trail in Yellowstone National Park and falling into ... their dog were walking off a designated trail near the Mallard Lake Trailhead on Monday afternoon when she broke through a thin crust ...

The 60-year-old was walking in a prohibited thermal area of Yellowstone National Park with her husband and dog when the incident occurred.

The 60-year-old woman had second- and third-degree burns to her lower leg after breaking through a thin crust over scalding water in a thermal area of the park.

A 60-year-old woman received third-degree burns walking in a thermal area in Yellowstone National Park in Wyoming this week, according to park officials.

Spanning swaths of Montana, Wyoming and Idaho, Yellowstone National Park is home to one of the most famous images to come out of the 63 national parks across the country. The bright blue, green and orange colors of the geothermal geyser Old Faithful are caused by thermophiles or microscopic organisms that thrive in hot temperatures in spring water rising from deep within the ground.