Soooo many! Do you want them to return to "the world", maybe changed in some way? If so I think Gardens of Ynn, Escape from the Astral Spellhold and even Death Frost Doom could be good.
Maze of the Blue Medusa is a solid alternative. Maybe. https://www.drivethrurpg.com/product/191419/Escape-from-the-Astral-Spellhold
@gunnar I'm thinking straight up TPK, the characters all wake up in a new reality at some sort of pearly gate (and they cannot return)
@gunnar all of those are cool! I'm not running a campaign, thinking of creating my own setting for this very purpose :)
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