thien cung cave halong bay vietnam |
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navigate by keyword : artificial asia attraction bang cave cavern caves dark deep deposition depth destination discovered formation geological geology heritage historical hollow light lighting lime limestone national natural naturem park rock sediment stalagmite stone subterranean tourism travel underground unesco vetnam world years |
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After entering a narrow gate, the grottoââ¬â¢s 130-meter-long girth opens up. Getting in we are astonished by the very animated and splendid beauty which is made from stalactite. |
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