Trinh Nu Cave   The Trinh Nu Grotto or Virgin Grotto is situated on the island range of Bô Hon in the system comprising the Sung Sôt Grotto, Dong Tiên Lake and Luon Grotto. It is 15 km south of Bai Cháy Beach. For fishermen, the Virgin Grotto is their house, but for young lovers, it is considered as the symbol of truly love, and is the romantic place for taking oath of love. Entering Trinh Nu Grotto, one finds in the middle of the grotto a stone statue of a lying-girl with her long hair hanging down who is looking to the sea in a vain hope.

 Thiên Cung cave It is situated on the south-west side the bay, 4 km from the wharf outside of Ha Long City. The way to Thiên Cung is a perilous one, covered on both sides by thick forest. After entering a narrow gate, the grotto’s 130-meter-long girth opens up. Getting in we are more astonished in front of the very animated and splendid beauty which is made from stalactite. On the east wall of the grotto, there is a grandiose and imposing picture with characters of tales.  Going out of the Thiên Cung Grotto, we have a sensation of just watching a unique, meticulous, interesting fine-art museum which is made by nature, get out of the imagine, ability and intellect of man. This grotto is recently discovered, one of the most beautiful grottoes in Ha Long Bay.

 Tam Cung Cave The Tam Cung Grotto or Three-palace Grotto is situated in the centre of Ha Long Bay, 5 km from Sung Sôt Grotto to the northeast. The grotto itself is divided into three parts; after threading the stone cracks, you find the first chamber. Many beautiful forms can be garnered from the rocky shapes. Continuing on to the second chamber, the bumpy way leads to a spring with fresh water. The last room contains further incredible stone depictions. Tam Cung Grotto lies in Mây Ðèn, a luxuriant island nearly isolated from other islands. Mây Dèn’s cliffs are extremely vertical, while its forest is flourishing.

 Sung Sot Cave   Situated in the centre of the UNESCO-declared World Heritage area, the Sung Sôt or Surprise Grotto is on Bo Hòn Island, and is one of the finest and widest grottoes of Ha Long Bay. Ascending to the grotto, the way is covered by trees and foliage, and consists of great paved stone blocks. Inside, it is partitioned into two chambers; the first one being similar to a wide theatre hall. Many stalactites hang from the high ceiling, with numerous possible forms and shapes. A narrow passage leads to the second rooms, where a flow of light meets visitors. The chamber is so immense it could contain thousands of people at one time.

 Mê Cung Cave   Two kilometers south-west of Ti Top Beach is the Mê Cung Grotto or Bewitching Grotto. It formed on Lom Bò Island, and seen from afar, the entrance is like the roof of a house denting the island’s side. After a narrow crack only allowing one person through at a time, many partitions appear. These chambers are somewhat small and narrow, but very refined, and with many stalagmites and stalactites bearing beautiful forms.

 Luon Grotto   Situated on Bo Hòn Island, 14 km south of Bãi Cháy Beach is the Luon Grotto. In front of the grotto is Con Rùa Islet, and the Sky Gate is on the right. Here the cliffs stretch vertically out of the pure blue and smooth water. At the water-level, an arched entrance leads to the grotto, just at the base of the island. Passing through the pretty entrance, you come across a tranquil round lake, surrounded by luxuriant trees and high dangerous stone walls. Monkeys run to and fro in groups, benjamin fig trees shade the landscape and many orchids hang their sweet-scented flowers. In the lake, many species abound: shrimp, fish, crab and cuttle-fish.

 Kim Quy Cave   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 the grotto 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 of the grotto where a stream flows. The stalactites here are snow-white and lightly hang from the ceiling.

 Ðau Go Cave   The grotto is on Driftwood Island. Seen from afar, the entrance to the grotto appears to be blue, and has a shape similar to that of a jellyfish. After 90 steps up the island, the entrance is reached. The ceiling of the grotto is about 25 m. Hundreds of stalactites falling down from the roof of the grotto look like a waterfall. The grotto is divided into three main parts. The exterior is a room with a vault full of natural light. Many forms may be seen in the rock formations of the chamber, depending on the imagination of the visitor of course.

 Bo Nâu Cave   Some 2-3 km southeast of Trong Mái Islet lies Bo Nâu Cave or Pelican Cave. This vaulted grotto covers 200 m2. The floor of the grotto is wide and flat, but not deep, and its wall features lots ofstalactites and stalagmites.

 Ba Ham Lake   Situated on the south-west side of Ha Long Bay, Ba Ham Lake is found on Ðau Bê Island (Calf Head Island) in Lan Ha Bay. This island is part of the range of islands at the farthest end of Ha Long Bay, bordering the immense zone Long Châu Sea. Ba Ham Lake is situated in the middle of a narrow, rectangular area, with the all four sides enclosed by vertical cliffs.