Kim Quy Grotto or Golden Tortoise Grotto is situated on Dâm Nam Islet,with a peak 187 m above sea level. Dâm Bac Islet is in the front of thegrotto and Soi Sim Islet in the back.

The grotto is 100 m long and 5 to 10 m wide, running in a north-south direction.

A narrow way leads to the interior ofthe grotto where a stream flows. The stalactites here are snow-white andlightly hang from the ceiling.

It is linked to the ancient legend ofthe Golden Tortoise: after having helped Emperor Lê Loi defeat hisenemies, the Golden Tortoise took back the magic sword he had given him,and swam towards the sea. Arriving in Hạ Long Bay, it met with so manyevil spirits and demons hindering its journey that it remained to dobattle. After having defeated them all, the Golden Tortoise was soexhausted that it searched for a grotto to rest in, and once inside,turned to stone.

Today in the grotto, it can be found dozing, still with ancient wounds covering its body.

(halong cruise.info)