Zhangye Danxia Landform, Gansu, China
These colourful rock formations are the result of red sandstone and mineral deposits laid down over 24 million years. Wind and rain then carved amazing shapes into the rock, forming natural pillars, towers, ravines, valleys and waterfalls.
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.