Many knew the story of a new Underworld World where Advance Human Races or creatures reside.
There are people who have come there like Admyral Bird of American Airforce.
Another one of them is Adolf Hitler who reach to the point of the tunnel to the so called Hollow Earth.
This tunnel is located right in the northernmost part of the world called tje North Pole.
But in reality the North Pole is juat a name and you cannot see any islang on there.
It is onle the sea can onle be seen and its covered with clouds on Google Earth itself so that people do not notice it.
This tunnel is also guarded by the military forces of the so called One World Government which is led by wealthy people.
In this Hollow Earth you can find similarities found in our world.
It has forest,mountains,oceans and its own sun and air.
The creatures that live here are more advance in their thinking and more advance in technology.
Ah Agartha, like a world down under, base from some of my readings before this is a conspiracy theory