son hang doong cave
in Vietnam is the largest cave in the world.
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#light#Vietnam#formation#pit_cave#黑暗#Rock#光#Water#cave#watercourse#sondoong#erosion#darkness#underground_lake#构成#水路#水
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bhabanipujaribhabanipujari
in Vietnam is the largest cave in the world.
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bhabanipujaribhabanipujari
