I suspect my interest in the subject stems from the numerous recommendations I've received ..... "You really should go to ...".
Being an agnostic and all I don't credit Hell, or the conventional images thereof, greatly. But I find them interesting nonetheless.
Examine, for example, the Greek Hades, not a Hell per se, but hardly a place one would want to spend an eternity. Compare it to the Christian Hell, the punishment for an unproductive life, a life led as a sinner, as a non-believer, a place where anyone who thought differently than they did was sure to end up. A hell filled with fire and brimstone, the sulfurous hell of Satan and his attendant demons. And contrast it with the Buddhist Hell, similar in it's appeal, but there's the underlying belief or knowledge (??) that everything is an illusion, a projection of one's own consciousness, hence whatever your own hell contains it's of your own imagining. And the philosophy of reincarnation, which rewards or punishes you depending on your life's Karma.
Or the Chinese Hell, one filled with the conventional pleasantries, but to add to the pleasure there's an infinite number of weary and dysfunctional bureaucrats, so paralleling life on earth that it's necessary to forward one's ancestors "Bribes" or "Hell Money" so that they can make their way through with a minimal of discomfort.
Follow any of the links above to continue your investigations; this post is purposely brief to inspire your imagination. The illustrations are all by Gustave Doré, whose images of a frozen hell as a child terrified me....