Journeys into the Hollow Earth
Are there entrances to the interior of the Earth at the poles? Some say past expeditions have proved it. And now you have a chance to join the ultimate adventure in search of unexplored territory in the interior of the planet.
Secrets of the Hollow Earth
The interior of the Earth, some believe, is home to strange races of technologically advanced beings. Who are they and where are the hidden entrances to their subterranean cities?
Nazis and the Hollow Earth
Did Hitler's Nazis believe in a hollow Earth - and did they escape to the planet's interior after the war? From your About.com guide.
Expeditions exploring deep, mysterious tunnels and caves in various parts of the world return with strange tales of subterranean civilizations, cities and advanced yet ancient technology.
Another Human Civilization May Live Inside Earth's Hollows
Legends say that an entry to the underground realms was located somewhere in the North, and legendary ancient tribes living on the planet centuries ago used the entries to have a good shelter under the Earth's surface.
The Expanding Hollow Earth Theory
The expanding Earth idea has been around for a long time, but the driving force was missing, this site says. This is where the Hollow Earth theory comes in.
Giants in the Hollow Earth
Actually takes you, page by page, inside the hollow Earth, describing the lost city of Agartha you'll find there. Yes, they're serious.
German Submarine U-209 Made It to Our Hollow Earth
A letter from Karl Unger, a German crewman from the U-209 submarine, claims that the vessel made it to the hollow earth soon after World War II.
The Hollow Earth Theory
The crux of the hollow earth theory is that the earth is a shell with walls about 800 miles thick. In the polar regions there are holes 1,400 miles across, with edges that curve smoothly from the outside of the shell around to the inside.
International Society for a Complete Earth
A group dedicated to understanding hollow earth theories, founded in 1977 by Captain Ritter von X (an anonymous name at his request).
The Odd Exploits of Admiral Byrd: "Bitter Reality" At Earth's End?
In spite of his scientific and historic achievements, there are lesser known theories that suggest Byrd was onto something that went far deeper than his exploration of the surface world.
Here is an extensive list of underground bases and what is currently known about them, culled from research. Includes a map.
The Vril Society
... or The Luminous Lodge presented the idea of a subterranean matriarchal, socialist utopia ruled by superior beings who had mastered the mysterious energy called the Vril Force.