Diver Finds Structure on Ocean Floor — Then Finds Out Why It’s There

Touching it

Getting closer, Eli swept his hand along the east wall. The material indeed felt like aged stone or something concrete-like, not the usual rusted steel of sunken vessels. The buildup of sea life was thick, almost ancient. There were what looked like relief carvings, or at least intentional indentations—shapes too deliberate to be random erosion or barnacle patterns.