14. Benxi Water Cave
The Benxi Water Cave is a majestic cave found in Liaoning, China. The cave was formed more than five million years ago and is bursting with color. It features a dramatic array of stalactites and stalagmites that are enclosed with the vibrant colors of yellow, red and green. It is said to contain the world’s longest underground river which is about 6 kilometers long.
Image Credit: China.org.cn