I must confess I had no idea what Pareidolia meant. But a friendly lady taking pictures of a safe with a hole drilled in it was kind enough to explain.
She showed on her phone an endless series of images of everyday objects, like a slice of bread or cucumber. All these images had one thing in common: the structure of the object was not altered but still shaped in a way to clearly show a face. And that basically is what Pareidolia is: seeing (or hearing) shapes in objects that were not purposely designed with that in mind.
Once she noticed one face somewhere, she started to notice them everywhere. Including in this poor drilled safe. And now I see them too.