Know about world's largest cave Son Doong in Vietnam

 



‘Hand of Dog' is one of many massive formations that visitors will see in the cave. It dwarfs the explorer standing next to it.
 

 

A river runs through the cave, slowly eroding away the limestone.



Waterfalls and pools can be found as well.



Rare cave pearls, which form when water laden with minerals dripping from a cave's ceiling falls too quickly to form a stalagmite.

Instead, the dripping water forms a small ball of mineral deposits that grows into a small mineral pearl.