|Location:||Ha Long Bay|
|Light:||Incandescent Electric Light System|
|Address:||Hang Trong, Tel: +84-, Fax: +84-,|
|As far as we know this information was accurate when it was published (see years in brackets), but may have changed since then.
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Hang Trong or drum cave was named after the wind blowing through the stalactites and stalagmites creating a sound which resembles distant drumbeats. There is also a legend connecting this cave with Hang Trinh Nu (Virgin Grotto), a second cave nearby. There is a stalagite in Hang Trong resembling the statue of a boy. The sound is said to be the vain scream of the boy.