The Territory

https://pixabay.com/illustrations/home-mountains-fantasy-floating-5889366/

Much blood has … been spilled on the carpet in attempts to distinguish between science fiction and fantasy. I have suggested an operational definition: science fiction is something that could happen — but usually you wouldn’t want it to. Fantasy is something that couldn’t happen — though often you only wish that it could.

— Arthur C. Clarke, foreword, The Collected Stories of Arthur C. Clarke, 2000