Board Thread:General Discussion/@comment-26965399-20160928003947/@comment-7342272-20161002210248

Maybe it's something like Camp Half-Blood from Percy Jackson?

It's there, but to the eyes of mortals (and demigods, too) by a blinding magic called Mist, is replaced by the illusion of a normal strawberry field.

Maybe the country is only visible to actual residents and appears to be nothing to outsiders. Perhaps it's some kind of force field magic projected over the entire country ending at the wall, illusionary magic like Eve's hypnosis, if it's powerful enough to trick Elluka and Gumillia.