Sung Sot cave is the most famous cave in Halong Bay which is in the centre of the UNESCO World Heritage area. Sung Sot cave means Surprised Cave or Amazing Cave is on Bo Hon Island and is one of the most spectacular and largest grottoes of Ha Long Bay. The mouth of the grotto is reached by ascending about a hundred stone steps.

There are two partitions in Sung Sot cave. The first one is similar to a theater hall with many stalactites hanging from the high ceiling.

A narrow passage leads to the second chamber, where a flow of natural light bathes the surfaces. The light is filtering in from above, through a large opening creating a natural skylight, this opening also serves as the exit from the cave.

Close to the exit a mammoth formation stretches from floor to ceiling, tapering at the centre to form a concave pillar that appears to be keeping the ceiling in place.

Walking through the cave ones imagination can run wild conjuring up all kinds of fantastic creatures and fanciful creations.