I don’t think it’s that specific. As we see with “The Enchanted Forest” world, it’s expansive and covers various realms, seas, countries — it’s an entire world. Many of the characters in fairytale flashback refer to it as a full world, so it should be assumed that other realms are full worlds just like our’s and the fairytale world. So for Frankenstein, him and his castle is just a segment of the world, a Gothic Horror world. So he has his home location, but across the world there’s Transylvania and Dracula, in another part of the world comes other gothic horror stories etc.
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