Sung Sot Cave, Halong Bay

Cave is a one way route. The inside is filled with stalactites and stalagmites. The ceilings of the cave are carved from a prior earthquake where the ocean mixed with the minerals of the cave and created an acid that ate through the rock. There's free toilets at the beginning and end of the cave. The cave inside is cool and similar to an air conditioned room. There's a good viewpoint at the beginning and end of the cave that looks out to the water and the islets.

There are stairs to get to the entrance of the cave. No biggie. Take it slow if you have to. It's also quite humid, which is to be expected visiting in June. But the 3 stars bc it was a lot of tourists and it wasn't very organized. Just people jam packed in a smaller cave pushing and pressing each other, trying to get into a single file path to get to the Surprise part. Had they had lines or ropes or directions, that part may have not been so unpleasant. However once you get in there, what a site to behold! Plenty of space for all of those people and quite peaceful to be honest. Worth going, perhaps on a week day.