Back in 1585, Galileo Galilei was a strayed young man who had just dropped out of Medicine school to study exact sciences against his father's will. And, to compete for a vacancy of mathmatics professor in the University of Pisa, he decided to enter a polemic that moved that century's science: where is hell? And what is it like?
Well, he located Alighieri's version of hell. Which isn't quite the same thing - or is it? - as the traditional Christian hell. Whatever. Using math, Galileo stated that hell had a conic shape and was situated in the deepest part of the center of the Earth and its roof was right below the earth crust, around Jerusalem. Oooookeydokey.