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

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.

Although the ground around hydrothermal areas may appear solid, it is often fragile with scalding water lurking just below the surface. The woman broke through the crust and suffered second- and third-degree burns to her lower leg, park officials said.

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

A New Hampshire woman suffered burns on her leg after hiking off trail in Yellowstone National Park and falling through a thin crust over scalding water in a thermal area near the Old Faithful geyser.

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.

The 60-year-old was walking with her husband and dog near a geyser when she broke through the ground into scalding waters on Monday afternoon, according to the National Park Service.

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.

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