@Scubbie

Whatever shape the world is there could be areas off limits to the public that other sentient beings come from

Underground

Underwater

At islands censored off maps not viewable by the public

Or in or beyond the region to far north or to far south for civilians to be permitted to travel without special permission

Or sentient beings that are not from another planet but stay in the sky with flying machines or biological features that enable flying

David Icke - The reptile people