Internet sensation Grandma Joy, 89, is on a quest to visit every national park with her grandson

If you don't like the view, change your lens.

That's what Brad Ryan did after he finished years of higher education only to find out that becoming a veterinarian wasn't the "end all, be all" he thought it would be.

"I was going through my worst depression in life and I had been honest about the fact that I definitely had suicidal thoughts during vet school," said the 38-year-old Ohio man. "When a second-year student committed suicide, I thought I needed to get out. And for me, Mother Nature was always my greatest healer."

He drove to the Great Smoky Mountains for a reset with his octogenarian grandmother Joy Ryan, known as Grandma Joy, riding shotgun. That was four years ago. What started