Baigong Tubes. In China's Qinghai Province, there is a mounta | Forbidden History
Baigong Tubes.
In China's Qinghai Province, there is a mountain called Baigong, and in it there are 3 caves, 2 of which are ordinary caves, and through the third one a pipe stretches from the top of the mountain. There is another pipe that begins at the bottom of the cave and goes deep into the ground. There are 12 such pipes, ranging in diameter from 10 to 40 cm. They all have an intricate geometry and are intertwined with each other. Metallurgists have conducted thorough research and found that the pipes consist of iron oxide, calcium and oxidized silicon, and may be 20-30 thousand years old.
