Hollow Earth of Edmond Halley
The possibility that the Earth might be hollow is not a dead theory after all. The presence of caves all around the planet, always leads our curiosity to know where is their border, or where they can lead us.
The possibility that the Earth might be hollow is not a dead theory after all. The presence of caves all around the planet, always leads our curiosity to know where is their border, or where they can lead us.