John Cleves Symmes Jr.'s Hollow Earth Model: Clockwork Atomics x321

I love this theory. It's been kicking around as long as there has been written history. The idea that there are secret areas and hidden parts of the world is almost a dead thing. It's a shame really. Much of pulp fiction entails the exploration of the lost parts of history. I feel that the resurgence of pulp fiction's themes is the desire to regain, even superficially, some of the mystery that is gone from the world.