35. Hang Son Doong, Vietnam.
Hang Son Doong is the biggest cave passage in the world. It measures 200m high, 150m wide, and 5km long. It is so huge that it has its own river, jungle, as well as climate.
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35. Hang Son Doong, Vietnam.
Hang Son Doong is the biggest cave passage in the world. It measures 200m high, 150m wide, and 5km long. It is so huge that it has its own river, jungle, as well as climate.