I do not think Hell exists.
Well, Jesus gave us a hint what hell is like.
He really thought it exists.
You probably know there is a 'first hell' "temporary hell" where many go after death and hell that is after the Great Judgment, the Burning Lake, the 'second hell'.
Reference below is the second hell.
MT 5:29 If your right eye causes you to sin, gouge it out and throw it away. It is better for you to lose one part of your body than for your whole body to be thrown into hell. 30 And if your right hand causes you to sin, cut it off and throw it away. It is better for you to lose one part of your body than for your whole body to go into hell.
The first hell is more of an Underworld.
It has cities, levels, if you were really bad your sins would catch up with you ... children are at rest so the ones who were not really criminals.
It is Sheol in Hebrew.
In any case, the best one can describe it - it is a sad place for the OK people and a bad place for bad people.
Because of a seed C.S. Lewis planted I think the most reasonable interpretation of Scripture when it comes to any of the horrible aspects of Hell is not meant to be taken literally. By that I DO NOT mean not to be taken seriously by those who believe. Rather it is an attempt by mortal men to make clear how unbearable the pain of being forever separated from their God would be for a true believer and that to such believers any additional pain pale in comparison.
Pain is a spiritual pain or reality of sins burning one's soul.
But that is the 2nd hell.
CS Lewis wrote of the first hell. Great little book "Great Divorce".
Easy read and really, really interesting for anyone to read.
Now as to the tortures preached and taught there are many starting with fire and brimstone and ending with a frozen lake. And of course devils with pitchforks. Of course Devils as mainly providers of pain rather than the first to suffer it seems to run directly against a lot of Scripture. But fire and brimstone preachers have never let a minor detail like that even give them pause.
It makes for a great movie though.
Sins we had committed would come back at us.
Clearly the burning is not physical, since we are not physical in there.
But it is real.
Forgiveness of sins is really a great thing.
I am not preaching, I am making it as a factual statement.
Although you are an atheist I am sure you do not deny the possibility of the afterlife.