This is one of the most amazing mysteries of the ancient world. Mount Baigong in Qinghai Province in China is crowned with a strange pyramidal structure filled with caves that contain perfectly symmetrical, time-eroded metal pipes. They go deeper into the mountain and seem to feed from a nearby lake.
Could they be paved by aliens or ancient human ancestors?
This is how eyewitnesses describe these pipes:
Corroded pipes with a diameter of a needle up to 40 centimeters go from the depths of the mountain to a salt lake 80 meters away. Many pipes are uniform in size and look like they were laid on purpose.
These ancient objects are very deeply embedded in rocks, which excludes the possibility of their laying by our contemporaries. In the inhospitable surroundings of the mountain itself, there are only occasional nomads. Unless these nomadic tribes developed some secret advanced metallurgical technique, these pipes were not made by human hands.
So who built these ancient pipes deep into the body of the mountain?
Promotional video:
And here's a completely real story:
The most recent studies have shown that these metal pipes are actually the fossilized remains of tree roots. These rusted pipes are the result of pedogenesis (the process of soil formation) and diagenesis (transformation of soil into rock). Further experiments confirmed that the tubes contain organic plant material and even microscopic growth rings. The flood from the disappeared lake once carried these roots to where they are now.