I recently heard someone describing how hell and heaven were understood, or explained, by some spiritual traditions as a state "beyond", as "another world" separate from "this world" while Buddhism did explain hell as a "world" not separate yet not together with our world.
Not separate because there is no such thing as a "separation", as "distinct objective worlds", as "limits or boundaries" other than conceptual or chronological.
So hell (as a place other than were I am now) exists as such if we accept to talk about it in conceptual terms only.
In whole terms, there is no such "place" until it is actually experienced and then it is no more a "separate" place.
Is hell another place in the understanding of it is as a result separated from our actions by a distance of time?
Maybe we experience hell now as a separate experience from the action that created it, example: a kind hearted person suffers from cancer. The relation between cause and effect is not obvious as the witness of the cause has vanished and it is no more a known cause other than by extrapolation and intellectual understanding of it over faith in previous lives.
Maybe we fear the experience of hell in the future as we project conceptually the result of some of our actions that we recognize as non-virtuous, this based on faith (faith that our actions will bear fruits resembling their causes and experienced by the doer) and intellectual cognition.
But even the chronological "separation" is conceptual because an understanding of the past can only be conceptual simply because the past does not exist anymore nor anywhere else than in the result of our actions.
Thus the past IS our present (as a result) or is a conceptual limited understanding, the latter not being a reliable understanding and merely a thinking tool.
One that believes in hell is one that believes in future lives, either "eternal" hell as portrayed by some traditions or temporary hell by others.
This belief is an intellectual conceptual foundation propelling one to refrain from non-virtuous actions and engage in virtuous actions. All religions have this in common and conceptualize it in various forms for our understanding.
I think all religions would say that the Truth is beyond our intellectual understanding, yet they do rely upon our intellectual understanding and thus conceptualize it to various degrees for us to grasp.
Hell is thus a concept that is easily grasped.
Attached herewith is an image by Jerome Bosch depicting the "HELL BOUND ON A SHIP OF FOOLS" in case we have too little imagination to grasp the concept of hell.