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