Mystery of Baigong Pipes: Ancient Pipes Found in Mount Caves.
The Baigong Pipes, strange pipe-like structures found in the caves of Mount Baigong, have led to wild speculation from conspiracy theorists who believe they are evidence of advanced but ancient civilizations or ancient aliens. However, they are most likely formed by geological processes and are similar in composition to fossilized trees found in other parts of the world. The Baigong pipes contain organic plant matter, suggesting they were formed by minerals that filled fissures in sandstone during flooding of the area or by tap-root casts of fossil trees.