Hollow Earth, The Biggest Cover Up – The Full Documentary. This is done at the request by some of my Subscribers / viewers, also posted as 4 separate parts on my channel. In this series i will try to unravel all the mysteries concerning this amazing topic. I will cover several rumours that are linked to the Hollow Earth theory, like the Nazi and Reptilian connection. So, sit back and enjoy the full Documentary and remember, keep an open mind!!.