Around 200 BCE ancient people would flock to a Temple in the City of Hierapolis, which was part of the Roman empire in modern day Turkey. Located on top of a cave was what they believed to be the Gateway to Hell, named Plutonium after the God of the Underworld Pluto. Animals of all various sizes from birds to bulls would drop dead at the entrance or soon after as the people believed the cave was thought to exhale the breath of death, of course more than 2000 years ago this was quite the phenomenon to behold.
