Dark and Light Cave (also known as Day and Night) is not only known for the stunning limestone structure at every turn but also for the interesting natural habitat. On the cliff one still find traces of fossils of fresh-water snails, which prove that the cave was inhabited thousands of years ago. Monkeys run to and fro in groups, benjamin fig trees shade the landscape and many orchids hang their sweet-scented flowers.

Dark Cave & Light Cave

The caves is formed by an enclosed group of islands, which is still in the Halong Bay area, but close to the border Bai Tu Long Bay and Lan Ha Bay. The imposing islands create a sea-lake sheltered from the blows of sea wind and only connected with the sea through a 4 meter wide, 100 meter long, and 3 meter high mouth. The lake inside seems like a stadium surrounded by high podium. On the cliff one still find traces of fossils of fresh-water snails, which prove that it was a human habitat in the past and must have been a deep valley then.

Exploring Dark and Bright cave, the best way is doing kayaking and swimming through the tunnel. While the Bright Cave is always available, the Dark Cave can be swallowed by the tide and difficult to pass through. Surely, you will surprise with amazing limestone islets and mountain in this area. Controlling your kayak and explore each corner of Dark and Bright cave by your style.
The beauty of the Dark and Bright cave is the mingling of a number of factors: the mountain’s size and form, the color of the water and the clouds.