A mythical land depicted in movies, television shows, and other fictional works of the middle 20th century. Seems to have been located in upper Latin America. Was peopled by exuberant, attractive "white persons," a type thought once to have been widespread in the area.
California was consistently represented as prosperous, but this is strictly notional. Present-day inhabitants of the area have found it to be without economic resources.
He: California was so nice. Too bad it never really existed.
She: -- Are you sure?
He: ... Pretty sure.