The longest cave in the world is located in Vietnam!
The longest cave in the world is located in Vietnam and is over 20 kilometers long. You can even find an underground river inside!
Curiosities are interesting because they provide fascinating information and knowledge about the world we live in. They help broaden your horizons, expand your imagination and arouse curiosity.
Visit our channel with many long, beautiful and original lullabies of 6, 8, 10 and 12 hours.
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Animation and Production: AVM, Relaxing Lullabies by Greg S.
Music: In The Throes - Asher Fulero
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