Thermal springs in Yellowstone are unpredictable in nature and surrounded by possible weak ground layers. Boardwalks are in place to protect you from serious injury or worse, as well as the precious ecosystem the National Park was established to preserve. Staying on the trail could save your life and helps encourage other hikers to do the same.

"If we had seen the sign or anybody warning us, you know ‘hey! hey! hey!’” Aita recalled. “But nothing that I saw gave me that immediate flag.”

A Colorado man was sentenced to jail and banned from Yellowstone National Park after officials say he walked off a designated trail and entered a protected area.