By Dennis Jarvis from Halifax, Canada – China-7516, CC BY-SA 2.0, Link
The Reed Flute Cave, also known as “the Palace of Natural Arts” in Guilin, Guangxi, China, is a natural limestone cave with multicolored lighting and has been one of Guilin’s most interesting attractions for over 1200 years. It is over 180 million years old.
The cave got its name from the type of reed growing outside, which can be made into flutes. Reed Flute Cave is filled with a large number of stalactites, stalagmites and other rock formations. It was rediscovered in the 1940s by a group of refugees fleeing the Japanese troops. Nowadays, multicolored lighting artificially illuminates the cave.
info: Wikipedia
By Dennis Jarvis from Halifax, Canada (China-7498) [CC BY-SA 2.0 ], via Wikimedia Commons
By G41rn8 – Own work, CC BY-SA 4.0, Link
By lienyuan lee, CC BY 3.0, Link
By Flickr user: Bernt Rostad https://www.flickr.com/photos/brostad/ – Flickr: https://www.flickr.com/photos/brostad/3928867267/, CC BY 2.0, Link
By luchangjiang~鲁昌江, CC BY-SA 3.0, Link
By luchangjiang~鲁昌江, CC BY-SA 3.0, Link
By luchangjiang~鲁昌江, CC BY-SA 3.0, Link
By Paul Munhoven – Own work, CC BY-SA 3.0, Link
e MORFES 
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Love all those colors and light. Textures too. 🍸
So beautiful.