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

A woman visiting Yellowstone National Park got second- and third-degree burns after wandering off-trail with her dog.

A woman suffered severe 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.

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 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.

The woman was reportedly walking with her husband and their leashed dog in a thermal area — but they were not walking on a trail.

A woman suffered third-degree burns at Yellowstone this week after accidentally breaking the crust of a thermal pool and plunging her leg into the scalding hot water, according to the National