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.

The teenager, a 17-year-old boy, was hiking on Monday in the thermal area near the Lone Star Geyser, which is in the same geyser basin as Old Faithful, when his foot broke through the crust, causing “significant thermal burns to his foot and ankle area,” the park service said in a statement.

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.