Vung Vieng is also known as Vong Vieng Village. Bai Tu Long and the Vung Vieng Fishing Village is off the beaten tourist track as it is not so near to the popular Cat Ba Island which has lodging, beaches and nearby caves where most of the large tour companies and boats operate. There are about 50 families; the population is between 200 and 300 residents. This includes nearly 100 children.

Taking a ride on a car or train for two hours from Hanoi to Haiphong, then on a high-speed vessel for another hour, visitors will arrive at Cat Ba Island, the biggest island (100km?) out of the 366 islands on the Lan Ha Bay.

Located to the east of Cat Ba Island, Lan Ha Bay covers an area of more than 7,000 ha of which 5,400 ha is under the management of Cat Ba National Park.

Bai Tu Long is a beautiful Bay lying within the area of the gulf of Tonkin, on the northeast of Vietnam. The bay comprises a part of Halong’s sea, Cam Pha town and Van Don Island District. It shares the border with Halong Bay on the southwest, with the sea on the east, with Cam Pha town on the west and with Co To island district on the northeast. Bai Tu Long Bay includes hundred of islands and islets, several among which are residence for local people

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

Two kilometers south-west of Ti Tốp 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.

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 Tam Cung Grotto or Three-palace Grotto is situated in the center of Hạ Long Bay, 5 km from Sửng 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.

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

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