In the 1954 film Brigadoon Americans Tom Albright and Jeff Douglas are on a hunting trip in Scotland, when the come across a quaint Scottish town not on any map. Brigadoon. But they soon learn from the old man it really never was on any map, because it never existed. It only exists in people's hearts. Wouldn't it be great if there was really a place like that?
Yes & no on that. & there are many similar tales or actual events. Time trap an episode of animated trek. Lost horizons, which @least the warm pocket part does exist & is more than just one. An interesting debate would be whether this is lower astralplane which aint a nice place. Or an alternate timeline. Or the 4th dimension which is better half of lower astralplane. Or viceversa.
Trumanshow timetrap & brgadoon abt samesize. Casino royale on nxtgen smaller. Also checkout mrs peregrine school.