Wales
From Jenny Everywhere Wiki
Wales was a location which existed in multiple universes.
In the home universe of Jenny Over-There, the original M.F.S. office was located in Wales, with a later branch in Scotland. (PROSE: Open Sourcing)
Dynamite Thor, after moving there, confessed to Jenny that he'd never been to Wales in his original universe, suggesting it also existed there. (PROSE: A Series of Queer Events)