trinh cave virgin halong bay vietnam |
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| navigate by keyword : ancient archeology asia bay cave colorful culture destination geological geology grotto halong historical hon island landscape long mountain nature nonurban outdoors prehistory seascape stalactite stalagmite tourism travel trinh underground unesco vacation vietnam view virgin |
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| The Trinh Nu Cave is an important archaeological relic in Halong Bay. .In 2000, archaeologists discovered remains of prehistoric inhabitants of the Halong culture |
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