This video presentation highlights the story behind the Hollow Earth Theory and the subterranean civilization beneath our world. Many are still asking whether or not this is true.. Totoo ba? In ancient times, the concept of a subterranean land inside the Earth appeared in mythology, folklore and legends. The idea of subterranean realms seemed arguable, and became intertwined with the concept of "places" of origin or afterlife, such as the Greek underworld, the Nordic Svartálfaheimr, the Christian Hell, and the Jewish Sheol. The idea of a subterranean realm is also mentioned in Tibetan Buddhist belief.According to one story from Tibetan Buddhist tradition, there is an ancient city called Shamballa which is located inside the Earth. According to the Ancient Greeks, there were caverns under the surface which were entrances leading to the underworld, some of which were the caverns at Tainaron in Lakonia, at Troezen in Argolis, at Ephya in Thesprotia, at Herakleia in Pontos, and in Ermioni. In Thracian and Dacia