The book that solidified a lot of of the ideas about Hell wasn't the Bible, it was Inferno, the first part of Dante's Divine Comedy. He took the place of darkness, blended in a big dollop of Tartarus, and built the modern ironic Hell, where your torment is not only eternal, but symbolic. Even the structure, with treachery and betrayal as the worst sin, is rather Aristotelian in outlook if I recall correctly.

It hasn't been about exactly what the Bible said for a very long time. I'm sure all of us of the internet atheist generation laughed at the rules in Leviticus. "Thou shalt not wear a garment that is woven of two sorts." and such.