See also San Escobar: https://en.m.wikipedia.org/wiki/San_Escobar
With a delightfully detailed map (featuring San Serriffe as a neighbour!): https://www.polityka.pl/multimedia/_resource/res/20122854
And a writeup by said map’s author (google translated from Polish): https://jarekkubicki-wordpress-com.translate.goog/2018/01/12...