It has long been rumored that huge networks of tunnels and caves are hidden underground, stretching thousands of kilometers. I have come across references to tunnels and caves under Europe, America, Africa and even under the oceans.
However, I'm sick of specific information about them very difficult to find.
But why is there so little information about the findings that could change the entire history of mankind? In my opinion, there are 2 main reasons.
The first reason is the modern version of the story. If it turns out that the tunnels or caves are of artificial origin, then it will be difficult to explain their existence.
And what if traces of unknown technologies for stone processing are found in such places? Then modern history will begin to burst at the seams.
There is one real-life example of finding such a cave in China.
Now the underground complex is called the Lunyu Caves.
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Scientists have been cleaning and studying these caves for a long time, but in the end they admitted defeat in this matter. Nobody could explain where millions of cubic meters of soil disappeared when creating the caves.
Also, they could not explain the traces of the tools with which these caves were created. If I'm not mistaken, even Wikipedia says that unknown tools or technologies were used to create the caves.
Imagine, if such huge caves begin to emerge everywhere, you will have to revise the entire history of mankind.
The historical part of the question deservedly became the first reason.
The second reason I think is political interest.
Just imagine, for so many years a bunch of states fought for territories and built borders, but then it turns out that underground you can go anywhere, bypassing any barriers.
No one wants to protect such tunnels, so they try to keep silent and ignore information about them in every possible way. It seems to me that in some cases it is easier to fill up the entrance to such a tunnel than to study it. I'm afraid that's what the majority do.
Let's summarize some small conclusions. Although there is no proven information about the existence of huge tunnels underground, there are several real finds that indirectly confirm this possibility.
