A Grate Rock
You know how people sometimes find treasures where they least expect to? Well, this was one of those times as this individual discovered an interesting fossil. Initially, it looked like a regular block of concrete that dropped on a metal grate. Internet findings, however, showed that this was a wrong assumption.
On the face of the rock is an impression made from an ancient trunk. The rock must have been on the trunk of the tree for a long while to make such an impression. Sadly, the type of tree that left this impression is unknown. Let’s hope that it was taken to a lab for identification.