When did Ho Khanh discover the cave?
1990
Who was the first person to discover the Son Doong cave?
Ho Khanh
What is the world's largest cave?
The world's largest cave is Son Doong.
How old is the cave?
3 million years old
What must you do in order to visit the cave?
You must climb down ropes, cross rivers, climb up walls, and get very muddy.
What do you call a place with a lot of trees, usually in a tropical environment.
jungle
Where is Son Doong located?
It's located in Quang Binh province, Vietnam
What did they discover inside Son Doong cave?
They discovered a large underground river as well as a jungle.