|Location:||Mây Đèn island. Ha Long Bay.|
|Address:||Động Tam Cung, 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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Động Tam Cung (Cave of the Three Palaces) has three chambers connected by narrow passages, hence the name. All three chambers show an abundance of speleothems. Three impressive statuesque stalagmites, high in the wall of the first chamber represent prosperity, happiness and longevity. The second chamber has much more speleothems, which are named after various animals. It also has a spring with fresh water, which creates a small cave river. The last chamber is again dry and again covered by an abundance of speleothems.
Tam Cung is located on the small island Mây Đèn, a limestone tower in the sea with almost vertical walls.