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.

A 17-year-old hiker has suffered significant burns while walking in a thermal area of Yellowstone National Park. According to a news release by the National Park Service, the unidentified male hiker was in the vicinity of Lone Star Geyser near Old Faithful on the morning of Monday, July 28, when the incident occurred.

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.