Phong Nha – Kẻ Bàng caves and routes, as the national park lists them

How the park sorts its visits

Phong Nha – Kẻ Bàng is a national park, and its management board publishes its own list of what visitors can do in it. The board says it has about twenty tourism products in use, plus some on trial, and sorts them into three groups: cave tourism, eco and experience tourism, and culture and history tourism. Inside the first two groups it separates general visits, which it calls "đại trà" (mass or standard), from exploration and adventure products.[1]

That split is the most useful thing to know before planning. A general visit is a ticketed trip into a show cave. An adventure product is a guided, often multi-day expedition sold by a company that holds a contract with the board. The board's tourism page names the company for each one.[1]

The park's office is in Phong Nha commune, Quảng Trị province, in the address the board gives today.[1] Why older pages place the park in Quảng Bình is covered in Vietnam's 2025 province mergers and place names. Phong Nha, the commune, is not the park, and it is not the provincial city of Đồng Hới: the board's own Sơn Đoòng itinerary collects guests in Đồng Hới and takes them to Phong Nha for the first night.[9]

Who runs what

The board describes three ways a visit is operated. It runs some itself, through its Phong Nha – Kẻ Bàng Tourism Centre: Phong Nha cave, Tiên Sơn cave, the Sông Chày – Hang Tối route, the Nước Moọc stream, the Road 20 Quyết Thắng memorial temple and the 4,500 m Phong Nha cave route. It leases forest areas to companies that run their own sites: Thiên Đường (Paradise) cave by Trường Thịnh, the Thung lũng Sinh Tồn valley by Mộc Nam, and the Rừng Gáo and Ô Rô standard tour by Phong Nha – Heritage. And it runs others in partnership with companies: Oxalis for Sơn Đoòng, Hang Va, Hang Én and the Hang Ba – Đại cáo tour; Jungle Boss for Ha Ma Đa – Trạ Ang, Đại Ả – Over – Pygmy and Hung Thoòng; Phong Nha – Heritage for the Ô Rô – Hoàn Mỹ adventure; T20 Quyết Thắng for Hang Chỉ Huy; and AREM for Bách Xanh – hang Kling.[1]

The general cave visits

Phong Nha cave. The board's route page describes the standard visit as a boat trip: visitors buy a ticket at the counter, take a numbered boat down the Son river for about 30 minutes to the cave mouth, and are then rowed with the engine off along about 1,200 m of underground river, before walking the dry branches called Hang Tiên and Hang Cung Đình on composite walkways. The same page publishes the entry and boat charges and separate summer and winter opening times; XTOUR does not repeat them, and the page is the place to check them.[4]

Tiên Sơn cave. It shares the boat. The board's page says visitors land at the Phong Nha cave jetty and climb nearly 600 steps to Tiên Sơn, a dry cave above the river cave, with its own entry ticket. The page credits the British Cave Research Association with the explanation of how the two caves formed, one above the other.[5]

Thiên Đường (Paradise) cave. This one is run separately, by a private company on a forest lease.[1] Its route page describes a standard visit along a 1 km wooden stairway inside the cave, reached by 1.6 km on foot or by electric car and a 500 m walk to the entrance. The page also sells a 7 km guided trek into the cave as a day tour or with an overnight camp.[6]

Sông Chày – Hang Tối. The park lists this in its eco and experience group rather than as a cave visit.[1] Its route page describes a 400 m zipline across the Chày river to Hang Tối, a cave with a mud bath inside, and kayaking on the river, sold in three packages, with height and weight limits for the mud bath and zipline. The page says the site may close in heavy rain, floods or storms.[8]

XTOUR's reading is that a visitor choosing between these is choosing between two operators as much as two caves: Phong Nha and Tiên Sơn are bought together at the park's own centre with a shared boat, while Thiên Đường is a separate site with its own gate and ticket.

The expeditions

The adventure products are where the park's list matters most, because each is sold by one company under contract and carries its own rules on the board's page.

Sơn Đoòng. The board's page says Oxalis Adventure has operated the Sơn Đoòng expedition exclusively since 2013. It describes six days and five nights, four of them trekking and camping in the cave, for at most 10 guests per group supported by a team of more than 30, and says the tour requires good fitness and trekking experience. The page gives the season as January to August and a limit of 1,000 guests a year.[9]

Hang Én. Also sold by Oxalis, as a two-day, one-night trek of about 25 km through Bản Đoòng village, with a night camped inside the cave. The board's page gives a season from December to mid-September, a limit of 16 guests per group and an age range of 16 to 70.[10] The Sơn Đoòng itinerary passes through Hang Én on its way in.[9]

Hang Va and Hang Nước Nứt. Oxalis again, as a two-day, one-night expedition with rope work, run from January to August, for at most 10 guests per group aged 16 to 70, according to the board's page.[11]

Jungle Boss routes. The board's pages describe Hang Trạ Ang, at Km 17 of Road 20 Quyết Thắng, as a 667 m cave that receives the underground rivers from Hang Én, Sơn Đoòng and Hang Va, sold in one-, two- and three-day programmes.[12] The Đại Ả – Over – Pygmy route is labelled a trial ("khai thác thử nghiệm"), and its five-day programme begins with a health check and rope training.[15]

The 4,500 m Phong Nha cave route. The park's own tourism centre sells a deeper trip into Phong Nha cave by kayak, with a swim at Xuyên Sơn lake and a stop at the Bi Ký branch, where the board says there are ancient Cham characters. The page gives a minimum age of 10 with a parent, groups of 3 to 20, and says the centre may change or cancel the route in heavy rain or floods.[7] For the Cham inscriptions, see Champa and the Cham towers explained.

The board's tourism page says that, because many products run in forest, caves and difficult terrain, rescue plans and equipment are reviewed and visitors' health is checked before some adventure programmes.[1] XTOUR adds nothing to that: it makes no judgement of difficulty, fitness or safety for any route.

Where the park's own pages disagree

Read side by side, the park's pages do not always agree with each other.

• Who runs Thung lũng Sinh Tồn. The tourism overview names Mộc Nam as the company leasing the Thung lũng Sinh Tồn area; the route page for "Thung lũng Sinh Tồn – Hang Thủy Cung" names Jungle Boss as its operator.[13][1] They may be different products in the same valley; the pages do not say.
• Who runs Ô Rô and Hoàn Mỹ. The overview names Phong Nha – Heritage for the Ô Rô – Hoàn Mỹ adventure tour; the route page names Đoàn Gia QB Investment Company.[14][1]
• The Thiên Đường group minimum. The cave's page says its 7 km day tour runs "only from 02 people", and a few lines later that tours run only with 05 guests or more.[6]
• Expedition seasons. The Sơn Đoòng and Hang Va pages give January to August; the Hang Én page gives December to mid-September.[10][11][9] These are different products and may simply have different seasons, but a reader planning around Hang Én's dates should not assume the others match.
• Visitor numbers for 2025. The tourism overview gives 893,027 visitors in 2025, 178,670 of them international; the board's visitor chart shows 719,090 Vietnamese and 180,505 international for the same year.[16][1]

XTOUR does not resolve these. Ask the operator named on the booking.

What UNESCO has recognised, as the park states it

The board's history page gives the sequence. The national park was founded in 2001; UNESCO's World Heritage Committee inscribed it at its 27th session in 2003 for its geology and geomorphology (criterion viii), and again on 3 July 2015 at the 39th session in Bonn for its ecosystems and biodiversity (criteria ix and x). In 2025 it became part of a transboundary World Heritage property with Hin Nam No National Park in Laos, and on 5 June 2026 UNESCO's Man and the Biosphere council, meeting in Hernandarias, Paraguay, named it a World Biosphere Reserve. The board also says the park became a special national relic in 2009 and that its boundary was enlarged to 123,326 ha in 2013.[2]

XTOUR could not open UNESCO's own World Heritage pages for these inscriptions on 11 October 2026, so the dates and criteria above are the park's statement of them; Vietnam's World Heritage sites sets them beside the other properties and gives the Thăng Long centre's dating of the first inscription. Surveys, the board says, have recorded 472 caves with a combined length of more than 259 km.[1]

What XTOUR does not know

• Prices and opening hours. The park's route pages publish them, undated; XTOUR does not republish them as fact.
• Which of the disagreeing operator names is correct for Thung lũng Sinh Tồn and Ô Rô.
• Accessibility of any cave, boat or walkway.
• Travel time between Phong Nha, Đồng Hới, any airport or station, and the cave entrances. XTOUR holds no routing data.
• How far ahead the expeditions sell out, and whether permits beyond the operator's booking are needed. The park's pages do not say.

The full list of route pages is on the park's "Tuyến, điểm du lịch" page.[3]