Tianzi Mountains, China
These unqiuely tall and thin mountains are so alien that they were used in James Cameron’s “Avatar.” Formed underwater 380 million years ago, the flow destroyed surrounding sandstone, leaving only resilient stone pillars. Some of the columns have reached over 4,000 feet above sea level.
Sadly, the mining company that owns the caves could no longer afford to keep the massive pumps going to clear the chamber. I believe the pumps were shut down a few years ago and the cavern is refilled with water. The crystals are growing once again, but no one will ever see it.