A random chance discovery in 2007 of some ruins of a castle built more than 100 years ago by a South African hiker has sparked the creation of a near 52-hectare new luxury resort in the mountains of China; labeled the most eco-friendly in the world.

The Rainbow Mountains in China used to be one of Asia's best kept secrets. Now it's one of the most rapidly growing tourist attractions in the world. Find out more with Cruise Life.