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.

A 17-year-old hiker suffered “significant thermal burns” on his foot and ankle after coming in contact with a geyser at Yellowstone National Park on Monday, officials said. The unidentified teen sustained the injury while on a hike through a thermal area near Lone Star Geyser in the Wyoming section of the beloved national park,