Mysteries of Hollow Earth
Agharta, The Land Of Advanced Races
The kingdom of this inner society is called Agharta with the main-city of Shamballa.
Some images regarding the Hollow Earth theory
Hollow Earth (SpiritWeb)
Secrets of the Subterranean Cities, the Agartha Network and more
Hollow Earth Showcase
Perhaps Mother Earth Is a Celestial Hive filled with Universal Beings
The Hollow Earth (UnMuseum)
Introduces the different theories of Edmund Halley, Leonhard Euler and Cyrus Teed
The Hollow Earth - Fact or Fiction?
Interesting source of information on the Hollow Earth theory
Traveler to the Interior of the Hollow Earth
Colonel Billie Faye Woodard of the United States Air Force states that he has "visited the Hollow Interior of the Earth six times, 800 miles deep."
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