Deros and Teros
Until Richard Sharpe Shaver came along, nearly all nineteenth- and twentieth-century hollowearth proponents spoke of the inner world's inhabitants as members of an advanced, benevolent race whom it would be desirable for human beings to meet and befriend. Shaver, however, had another story to tell. Shaver technologized hell.
Shaver alleged that for years he was tormented by evil creatures known as "deros"-short for "detrimental robots" (who were not robots as the term is ordinarily understood but "robots" in the sense of being slaves to their passions). Deros were the degenerate remnants of the "Titans," the people of Lemuria, who 12,000 years ago were forced to escape into great caverns under the earth to avoid deadly radiation from the sun. (Some Titans, however, stayed on the surface, adjusted, and became the present human race. Others fled to distant planets.) Deros--demons in all but name and close to it even there-were sadistic idiots who had access to the advanced Titan technology, which they used to increase sexual pleasure during the orgies to which they were addicted. They also used the machines in marathon torture sessions on kidnapped surface people and also on the "teros" (integrative robots, who were not robots but good Titans who, though vastly outnumbered, were fighting the deros); they also employed the machines to cause accidents, madness, and other miseries in the world above the caves.
Southern Ohio just has one of the entrances... they are located in many states.