Son Doong cave(Vietnamese: Hang Son Doong) is world's largest cave, located in Quang Binh province, Vietnam,
It is found by a local man named Ho Khanh in 1991, and was recently discovered in 2009 by British cavers,
led by Howard Limbert,(
)
The name "Son Doong" cave means "mountain river cave",
It was created 2-5 million years ago by river water eroding away the limestone,
underneath the mountain Where the limestone was weak, the ceiling collapsed creating huge skylight.
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