Meaning, hell had certain portals -- three gates, some of the Rabbis said --- one in the wilderness, one in the sea (I suppose that's the Mediterranean?) and one of them near Jerusalem (Gehenna).
I am no expert, not at all, and I don't know what this all means. It's not Catholic doctrine. I got the business about the portals from here:
Thanks for the link. I’ll check it out. You might check out the link I posted for study of Hell, as well.