Thousands of forested limestone islands and caves in the Gulf of Tonkin, explored by cruise boat and kayak from Ha Long city
Ha Long Bay is a drowned limestone landscape. Steep, jungle-topped towers and domes rise straight out of calm green water, and between them run sheltered channels used by fishing boats, cruise ships and kayaks. UNESCO describes the scenery as marine-invaded tower karst, and many of the islands are cut by sea notches, arches and caves, some of them small grottoes and others large chambers hung with stalactites.
The name means descending dragon, after a legend in which dragons sent to defend the country spat out jewels that became the islands. Most visitors see the bay on a day or overnight cruise from the ports of Tuan Chau and Bai Chay on the edge of Ha Long city, about two and a half hours by expressway from Hanoi. A cruise typically combines a walk through one or two caves, a climb to a viewpoint, swimming or kayaking among the karsts and a visit to a floating fishing community.
People have lived around the bay for thousands of years: archaeologists have named a prehistoric Ha Long culture, dated to roughly 5,000 to 3,500 years ago, after finds on the islands and coast. The nearby Bach Dang River was the scene of one of Vietnam's most celebrated victories, when in 1288 General Tran Hung Dao trapped a Mongol fleet on stakes planted in the riverbed at high tide; Dau Go Cave in the bay is linked in local tradition to that campaign.
UNESCO first inscribed Ha Long Bay as a World Heritage Site in 1994 for its scenery and again in 2000 for its geological value. In 2023 the property was extended to include the Cat Ba Archipelago in neighbouring Hai Phong, and is now listed as Ha Long Bay - Cat Ba Archipelago, covering 65,650 hectares and 1,133 islands and islets. Rapid growth in tourism, shipping and coastal development has brought problems of waste and water quality, which UNESCO names as the main management challenge.
Families in fishing villages such as Cua Van have long lived on floating houses, making a living from fishing and marine farming; the Cua Van floating cultural centre, on one of the official routes, introduces visitors to that way of life. On shore, Ha Long city is a busy port and resort with seafood markets and restaurants serving squid, clams, crab and fish from the bay. Coal mining in the wider province of Quang Ninh is another major employer.
The Ha Long Bay Management Board sets out numbered tourist routes from the ports, each with its own visitor fee: the popular routes combine caves such as Thien Cung, Dau Go and Sung Sot with Ti Top island, where steps climb to a viewpoint above a small beach, while others visit the Cua Van floating village centre, Tien Ong cave or the quieter Cong Do area. Day boats return in the evening; overnight cruises anchor in the bay, giving time for kayaking, swimming and a calm sunrise before the day-trippers arrive.
The bay can be visited all year. The national tourism authority recommends September to November, when skies are often clear and seas calm. Summer is hot and humid, with a chance of tropical storms that can cancel sailings, while winter is cooler and often grey or misty, which some visitors find atmospheric.
Checked against the sources on 29 October 2026. Opening times and fees can change — confirm before you go.
General guidance from our specialists, not official information.
Ha Long city lies on the shore, with Bai Chay's beach front and Tuan Chau island resort. To the north-east, Bai Tu Long Bay has similar scenery with fewer boats, and to the south-west the Cat Ba Archipelago and Lan Ha Bay can be reached by boat from Ha Long or by ferry from Hai Phong. Hanoi is about two and a half hours away.
Vietnam · 11 nights4★ HotelVietnam · 7 nights4★ ResortThis guide was researched from the sources below and reviewed by our team on 29 October 2026. Facts under “Verified information” link to the page they were checked on; travel tips are general guidance. Photos are credited on each image. The ambient recording’s author and licence are shown in the sound player.
