MuhVerisimilitude
Hero
If I were you I'd make the place a small-ish demi plane. An elven wizard lives there and has been living there for a long time and he's heavily invested in some kind of magical project. The PCs ending up there is convenient for him, because he might want to ask them for help in procuring for him certain ingredients from faraway places.
Fetch quests are cliché but they're cliché for a reason.
Fetch quests are cliché but they're cliché for a reason.