Not long ago, a subterranean network of mysterious ancient tunnels was discovered. The age of these tunnels is about 12,000 years.
There is an enormous tunnel in this tunnel network. It links Turkey and Scotland.
This discovery was made by German researcher Heinrich Kush.
The height of tunnels in some places is about 70 centimeters.
To find out more about this exciting breakthrough, watch the video below:
What do you think about this mysterious 12,000-year-old tunnel?