An enigmatic reticular formation "printed" on the side of a rock in Mineral County, West Virginia has caused debate among researchers and visitors for years.

Is it a simple geological oddity, or the residue of ancient technology? According to some researchers, this large piece of stone could have originated 300 million years ago.

Those who have seen the rock are baffled by its design and composition. Many say the angles of geometric patterns are so smooth that it is difficult to imagine that this is a natural phenomenon.