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Son Doong Cave
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PT Cards
Son Doong Cave
Son Doong Cave is the
largest cave in the world.
It is located in
Quang Binh province in central Vietnam.
It is about
400 to 450 million years old.
It was discovered in the
year 1991 by a local forager Ho Khanh.
It is now part of the
Phong Nha-Ke Bang National Park
(A UNESCO heritage site).
Its
total length is 9 km.
and it has the
largest cave passage
of any cave on the Earth.
It includes about
150 different caves, a dense underground forest, and several underground rivers.
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