Situated in the North-East region of Vietnam, Halong Bay is a bay in the Gulf of Tonkin comprised of regions of Halong City, the township of Cam Pha, and a part of the island district of Van Don. Halong Bay borders Cat Ba Island in the southwest, the East Sea in the east, and the mainland, creating a 120 km coastline.
Quan Lan Island belongs to Bai Tu Long Bay, it has an area of 11km², and features eight populated hamlets. Quan Lan Island stretch toward East – West from the foot of Van Don Range to the Got Mount with many high mountains to the east barring waves and winds, protect the villages.
In the itinerary of Thien Cung – Dau Go – Ti Top, after visiting Thien Cung and Dau Go, one needs 10 minutes boating to the Cho Da Islet or Stone Dog Islet.
On the south-east side of Ha Long Bay, about 25 km from Bai Cháy Wharf, Cong Do is in Bái Tu Long Bay in the region which recognised as the World Heritage. It has an area of 23,363 sq. m, and its mountain reaches a peak of 172 m.
On the south-east side of Ha Long Bay, Dau Be Island is 500 m from Hang Trai Island to the east, and 28 km from the Bai Chay Tourist Wharf, in an archipelago comprised between the Tra Nguyen Da Le islands outside Ha Long Bay (seaport of Lan Ha Bay).
