Ban Gioc: a border waterfall that changes with the rain

The Quay Son River drops over a series of limestone steps along a front of about 300 metres. Descriptions of its height differ: the national tourism authority gives 53 metres, while the Vietnam Airlines travel guide and most independent guides describe a drop of about 30 metres in several tiers. The difference is probably whether the whole sequence of steps is measured or only the main fall. The tourism authority places it in Dam Thuy commune, about 89 kilometres north of Cao Bang city.

The river is the border. The falls on the far bank are Detian, on the Chinese side, and the two are seen as one landscape from the Vietnamese viewing area. Ban Gioc lies within the Non Nuoc Cao Bang UNESCO Global Geopark, and the Nguom Ngao cave is about three kilometres away.

The site is developed: there is a ticket kiosk, paths to viewing points, bamboo rafts on the pool and a pagoda on the hill. It is busy at weekends and on Vietnamese holidays. The landscape around it — rice valleys and karst hills — is quieter than the falls themselves.

• Carry your passport. The airline guide and independent guides both say checks are possible near the border checkpoint, even though the ticket kiosk itself does not ask for documents.
• You cannot cross to Detian from the Vietnamese side as a foreign visitor. A pilot cross-border scheme opened from 2023 for Vietnamese and Chinese tourists, with advance registration, passports or border permits, and groups of up to twenty.
• Rafts on the pool are limited in number and kept away from the base of the falls on both sides.
• Swimming is not allowed except where guides or signs permit it; the pools have deep currents.
• Do not photograph military installations; the UK Foreign Office warns that border areas may be unmarked.

From Hanoi, sleeper buses run to Cao Bang city in about six to eight hours, for around VND 200,000 to 400,000. From Cao Bang city, local buses run to the falls about ten times a day, starting around 05:30, with the last return in mid-afternoon; missing it means no same-day return. A private car costs around VND 800,000 to 1,200,000 one way.

Road distances quoted for Hanoi to Ban Gioc range from about 270 to 335 kilometres depending on the route. All of it is mountain road for the last stretch, so the time matters more than the distance.

• Waterfalls and water levels
• UNESCO Global Geoparks of Vietnam
• Dong Van Karst Plateau, further west along the border
• Weather and site closures