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’s a huge architectural achievement,” said Jeff Henry, coauthor of the 2004 book “Old Faithful Inn: Crown Jewel of National Park Lodges. “To get it done in 11 and a half months in a very, very remote area, especially at that time, is incredible. It was the architect’s first major project, and he hit a homerun at his first at-bat.”

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.