If you haven't, it's a theory that says that there is a world under ours, in which a superior race lives called, "Agartha" http://en.wikipedia.org/wiki/Agartha

In 1947, Admiral Byrd documented witnessing the opening to this land while crossing over the North Pole,
Now, not only does he witness this place, talk to it's leaders, but he documents it. I would think that if it were false, there would be more controversy on the internet about it. But all I can really find is evidence.0949 Hours- 29 minutes elapsed flight time from the first sight ing of the mountains, it is no illusion. They are mountains and consisting of a small range that I have never seen before!
0955 Hours- Altitude change to 2950 feet, encountering strong turbulence again.
1000 Hours- We are crossing over the small mountain range and still proceeding northward as best as can be ascertained. Beyond the mountain range is what appears to be a valley with a small river or stream running through the center portion. There should be no green valley below! Something is definitely wrong and abnormal here! We should be over Ice and Snow! To the portside are great forests growing on the mountain slopes. Our navigation Instruments are still spinning, the gyroscope is oscillating back and forth!
1005 Hours- I alter altitude to 1400 feet and execute a sharp left turn to better examine the valley below. It is green with either moss or a type of tight knit grass. The Light here seems different. I cannot see the Sun anymore. We make another left turn and we spot what seems to be a large animal of some kind below us. It appears to be an elephant! NO!!! It looks more like a mammoth! This is incredible! Yet, there it is! Decrease altitude to 1000 feet and take binoculars to better examine the animal. It is confirmed - it is definitely a mammoth-like ani mal! Report this to base camp.
1030 Hours- Encountering more rolling green hills now. The external temperature indicator reads 74 degrees Fahrenheit! Continuing on our heading now. Navigation instruments seem normal now. I am puzzled over their actions. Attempt to contact base camp. Radio is not functioning!
1130 Hours- Countryside below is more level and normal (if I may use that word). Ahead we spot what seems to be a city!!!! This is impossible! Aircraft seems light and oddly buoyant. The controls refuse to respond!! My GOD!!! Off our port and star board wings are a strange type of aircraft. They are closing rapidly alongside! They are disc-shaped and have a radiant quality to them. They are close enough now to see the markings on them. It is a type of Swastika!!! This is fantastic. Where are we! What has happened. I tug at the controls again. They will not respond!!!! We are caught in an invisible vice grip of some type!
1135 Hours- Our radio crackles and a voice comes through in English with what perhaps is a slight Nordic or Germanic accent! The message is: 'Welcome, Admiral, to our domain. We shall land you in exactly seven minutes! Relax, Admiral, you are in good hands.' I note the engines of our plane have stopped running! The aircraft is under some strange control and is now turning itself. The controls are useless.
Read more- http://www.v-j-enterprises.com/byrdiar.html
All of the opening's that are said to lead to the hollow core of the Earth and the surface of Agartha are places that just make too much sense.
I want to post all of the information I've read so that this doesn't waste you time, but I have no idea how to lay it out.
In almost every religion, this place is referred to in some way. If you read what Admiral Byrd conversed with the leader of this world, in 1947, it's a little weird.
I think the only thing that really sold me is because the last thing that I studied was the forming of the UN to eliminate Weapons of Mass Destruction, which didn't happen until after this.I step inside and my eyes adjust to the beautiful coloration that seems to be filling the room completely. Then I begin to see my sur roundings. What greeted my eyes is the most beautiful sight of my entire existence. It is in fact too beautiful and wondrous to describe. It is exquisite and delicate. I do not think there exists a human term that can describe it in any detail with justice! My thoughts are interrupted in a cordial manner by a warm rich voice of melodious quality, 'I bid you welcome to our domain, Admiral.' I see a man with delicate features and with the etching of years upon his face. He is seated at a long table. He motions me to sit down in one of the chairs. After I am seated, he places his fingertips together and smiles. He speaks softly again, and conveys the following.
'We have let you enter here because you are of noble character and well-known on the Surface World, Admiral.' Surface World, I half-gasp under my breath! 'Yes," the Master replies with a smile, 'you are in the domain of the Arianni, the Inner World of the Earth. We shall not long delay your mission, and you will be safely escorted back to the surface and for a distance beyond. But now, Admiral, I shall tell you why you have been summoned here. Our interest rightly begins just after your race exploded the first atomic bombs over Hiroshima and Nagasaki, Japan. It was at that alarm ing time we sent our flying machines, the "Flugelrads", to your surface world to investigate what your race had done. That is, of course, past history now, my dear Admiral, but I must continue on. You see, we have never interfered before in your race's wars, and barbarity, but now we must, for you have learned to tamper with a certain power that is not for man, namely, that of atomic energy. Our emissaries have already delivered messages to the powers of your world, and yet they do not heed. Now you have been chosen to be witness here that our world does exist. You see, our Culture and Science is many thousands of years beyond your race, Admiral.' I interrupted, 'But what does this have to do with me, Sir?'
The Master's eyes seemed to penetrate deeply into my mind, and after studying me for a few moments he replied, 'Your race has now reached the point of no return, for there are those among you who would destroy your very world rather than relinquish their power as they know it...' I nodded, and the Master continued, 'In 1945 and afterward, we tried to contact your race, but our efforts were met with hostility, our Flugelrads were fired upon. Yes, even pursued with malice and animosity by your fighter planes. So, now, I say to you, my son, there is a great storm gathering in your world, a black fury that will not spend itself for many years. There will be no answer in your arms, there will be no safety in your science. It may rage on until every flower of your culture is trampled, and all human things are leveled in vast chaos. Your recent war was only a prelude of what is yet to come for your race. We here see it more clearly with each hour..do you say I am mistaken?'
'No,' I answer, 'it happened once before, the dark ages came and they lasted for more than five hundred years.'
'Yes, my son,' replied the Master, 'the dark ages that will come now for your race will cover the Earth like a pall, but I believe that some of your race will live through the storm, beyond that, I cannot say. We see at a great distance a new world stirring from the ruins of your race, seeking its lost and legendary treasures, and they will be here, my son, safe in our keeping. When that time arrives, we shall come forward again to help revive your culture and your race. Perhaps, by then, you will have learned the futility of war and its strife...and after that time, certain of your culture and science will be returned for your race to begin anew. You, my son, are to return to the Surface World with this message.....'
It makes sense that they're ahead of us scientifically, they've remained virtually unknown.
I don't know, it's just weird. I had to share.

