There was no note, just a code written on the back in shaky cursive: .

Elias, a data analyst by trade, couldn't let it go. "ME13YEIL," he muttered, rearranging the letters. He spent hours trying to crack it before realizing the numbers were the key. "13" wasn't a part of a word; it was an anchor. ME - (3) - YEIL "ME YEIL"... "EYE... MILE"?

That image filename is mysterious! Since I cannot see the specific image associated with "ME13YEIL_o.jpg", I’ve crafted a story based on the enigmatic, coded nature of that title. The Cipher in the Concrete

He drove to the abandoned tunnel, the paper photo tucked into his notebook. It was just as it looked in the picture—gloomy, cold, and quiet. He found the exact spot. The stone was gone, but in the dirt, there was a shallow depression, a perfectly round hole.