Hang Trong has wide-arched entrances on either side and a ceiling clustered with stalactites. It's so named because when the wind blows through its stalactites, the effect resembles the sound of distant drumbeats.
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Halong Bay
Hang Trong has wide-arched entrances on either side and a ceiling clustered with stalactites. It's so named because when the wind blows through its stalactites, the effect resembles the sound of distant drumbeats.