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 young man stepped off trail near Lone Star Geyser when the ground gave way, exposing him to scalding thermal water beneath the surface.

The incident occurred on Monday morning when the boy was on a hike in the thermal area of the park in the vicinity of the Lone Star Geyser near Old Faithful when his foot broke through the thin crust and he suffered significant thermal burns to his foot and ankle, according to a statement from the National Park Service.