In August 1971, a human face formed on the kitchen floor of María Gómez Cámara in Bélmez de la Moraleda, Spain. Her husband and son destroyed it with a pickaxe and laid new cement, but the face formed again. In the ensuing 30 years, the family says, a succession of human faces, of varying shapes and sizes, have appeared on the cement floor.

An excavation beneath the house reportedly found human remains, but removing them didn’t stop the apparitions. Spanish parapsychologist Germán de Argumosa claimed that the faces continued to develop even when the floor was sealed to prevent fraud, which he said proved their “paranormal origin.”

But, using infrared photography, his colleague Ramos Perera concluded that pigmentation had been added to alter one face, “and even the paint brush bristles could be perceived.” A third parapsychologist, José Luis Jordán, believes that an acid was used to oxidize the cement.

Maybe they should just switch to linoleum.