A teenage boy visiting Yellowstone National Park was seriously burned when his foot broke through the ground near a geyser by the infamous Old Faithful, officials said.

It was the first known thermal injury in the park this year. Officials urged visitors to stay on designated boardwalks and trails in thermal areas.

The park service continues to remind visitors to stay on designated paths to avoid serious injuries or fatalities. Pets are also prohibited in thermal areas to prevent similar incidents. This incident follows a series of other injuries in the park, including bison attacks earlier this year.