This cave in Guangdong province near Hunan in China opened to the public only 20 years ago and only the last 7 years linked by a major highway.

Much of the cave is in total darkness except for color LED lights that lit some corners of the cave. Flash was kept off. Although it would make the dark spots show up better but it also took away the fluorescent color effects.

Lightened the image on computer to give more details.