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The World’s Biggest Cave Has An Underground Lake

World Cave Lake

 

Son Doong is considered to be the world’s biggest cave.

 

 

The largest underground passage in the world is found inside this remarkable cave, which also contains an impressive ecosystem.

 

See world's largest cave, Hang Son Doong, in Vietnam | CNN

The underground river carved out this vast and complex network of caves, which were then filled with rock formations from the water that seeped down from the rainforest above.

 

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