Hello Vargas,
We discussed the hollow earth here before with Freedom, Louis and Adrian.

I think Louis can point you to appropriate videos.
I think Hollow Earth is very real depending on how you define reality.
What we experience in physical is only about 25% of the 10% (we perceive only 25% with our senses of the 10% of the total energy that is calculated to be in the Universe we know - 90% of the energy calculated at Big Bang disappeared now defined as 'dark energy' ...however from spirituality we know that those are just higher realms of vibration that we don't have the tools to measure and perceive).
So, everything goes just at different state: hollow earth, archangels, mermaids, dragons, and so on.

Now you understand why we are so attracted towards extrasensory perceptions (like seeing auras

) - at the core we just KNOW that there's more...