Plato wrote of the lost civilization of Atlantis being located somewhere beyond the Pillars of Hercules (now Rock of Gibraltar).
Considering ancient people saw the Pillars of Hercules as the edge of the known world ("Nec plus ultra" means "nothing further beyond" and was the local motto), this doesn't exactly serve as a GPS coordinate. But if it keeps late-night History Channel documentaries in business, why the hell not?
