Cao Bang beyond Ban Gioc: caves, Mat Than and how many days
Ban Gioc is one great day in a province of long roads. What else Cao Bang holds, how many days it deserves, how to get around without riding, and where our sources disagree.
Hoang Anh, host at Rustic House · · Updated · 7 min read
Photo: Manh Pham on Pexels
The short answer
Ban Gioc is the big name in Cao Bang, and it earns the trip: UNESCO calls it one of the world's largest waterfalls on an international border. But it is one great day, not the whole province. Cao Bang beyond Ban Gioc means Nguom Ngao cave, Mat Than and Pac Bo. Cao Bang can be reached only by road. Three days is our own judgement; one guide calls two full days ideal and another lays out five. On the ground, one writer found Grab did not work, and taxis are private drivers booked through homestays or restaurants.
We are a family on Cat Ba, a long way south of Cao Bang, and we do not run trips there. This guide is compiled from three trip reports by independent travellers, UNESCO's geopark page and the national tourism site, read side by side. Where they disagree, we say so.
Since a National Assembly resolution of 12 June 2025, Vietnam has 34 provincial-level units. Cao Bang is one of the 11 units that kept their names. Ha Giang next door merged with Tuyen Quang into Tuyen Quang province.
Ban Gioc waterfall: where the sources agree and where they differ
Ban Gioc is on the border, and the far bank of the river is China. One guide puts the falls at around 30 metres high and over 300 metres across, split into two sets. The superlatives differ. UNESCO's wording is "one of the world's largest waterfalls situated on an international border", the national tourism site calls it the world's fourth-largest along a national demarcation line, and one blogger says largest in Vietnam. The falls sit inside the Non Nuoc Cao Bang UNESCO Global Geopark, recognised in 2018.
One guide puts Ban Gioc 85 km from Cao Bang town, about a two-hour drive, with local buses running around ten times a day and taking two to four hours. The same guide says a dam upstream affects the flow, and that around lunchtime is best because the dam will have opened. Treat that as a tip, not a rule: a couple who came after a sunny spell in late April saw the falls below full flow and still found them dramatic. Prices and fees change, so check current prices close to your dates.
The falls sit on the border. One writer says drones are not allowed and phone service can act oddly, so download offline maps before you leave town.
Nguom Ngao cave: short route or long route
Nguom Ngao means tiger cave in the Tay language. A short route takes 20 to 30 minutes, and a guided long route takes one and a half to two hours. Another guide suggests allowing an hour. The floor is wet and slippery, so wear shoes with grip. Our sources give no distance from the falls, so look at the map before you plan the day.
Cao Bang beyond Ban Gioc: the stops that need the extra days
| Stop | From Cao Bang town | Time to allow | Watch for |
|---|---|---|---|
| Ban Gioc | 85 km, about a 2 hour drive | Most of a day (our judgement) | Flow varies, drones banned, patchy signal |
| Nguom Ngao | No distance in our sources | 20 to 30 minutes short, 1.5 to 2 hours long | Wet, slippery floor |
| Mat Than | 45 minutes to 1 hour | Aim for sunset, when it is busiest | Last 2 km muddy, steep and slippery |
| Pac Bo | 52 km north | 1 to 2 hours | Busy on weekends and holidays |
| Phuc Sen | North of town | Short stop (our judgement) | Hand-forged knives and sickles |
| Ba Be lake | Off the road south | Extra days | An ending, not a must |
Mat Than, the Angel Eye mountain, is a limestone mountain with a hole through it. Sunset brings crowds and a parking jam. In the dry season glamping tents fill the valley floor, and in wetter months a river floods it.
Pac Bo is where Ho Chi Minh re-entered Vietnam from China in 1941 and ran the first headquarters of his resistance from a cave. He named the stream after Lenin and the mountain after Karl Marx. Electric shuttles run inside, and the visit takes one to two hours. Weekends and holidays are busy, so a weekday is kinder.
North of town, Phuc Sen is a blacksmithing village of hand-forged knives and sickles, put on the tourist map by a government initiative. One writer who dislikes craft villages liked it, and was not escorted to a gift shop or asked for tips. With more days, Ba Be lake can be added at the end, off the road south.
How many days in Cao Bang, and when to go
| Days | What fits | Where the number comes from |
|---|---|---|
| 2 full days | The main sights, at a push | One guide's view |
| 3 days | Falls and cave, Mat Than and Pac Bo, with slack for weather | Our judgement, not a source figure |
| 5 days | The same, plus Ba Be lake on the way back | One guide's five-day route |
One guide calls two full days ideal for the main sights; squeezing them into one would mean seeing the province through a windscreen. For the wider picture, see how many days to give the north.
October to April is the easy window, and dry. November to February turns cold in the mountains. May to September is the rainy season, and the rain is not a small footnote: writers report mud across the road, sections washed out and the chance of landslides. Dark falls around six all year, and one writer advises against these roads after dark. Our month-by-month guide covers the rest of the north.
Cao Bang is not a day at the falls with filler around it.
Getting to Cao Bang and getting around without a bike
Cao Bang can be reached only by road. Buses and minivans from Hanoi take between six and nine hours. One writer's morning coach arrived around 5pm and dropped them at their accommodation. Night buses exist, though we would rather you arrived in daylight. From Ha Giang, direct buses link the two towns. Google gives five to six hours, but one guide says it will almost certainly take longer on winding mountain roads. Our Ha Giang loop without riding yourself guide covers the other end of that road.
One writer found that Grab did not work in Cao Bang, and that taxis were reasonably priced and easy to find. Taxis are private local drivers rather than a fleet, booked through homestays or restaurants. One writer calls an easy rider the best option for anyone without riding experience or a licence, on a loop of your choosing. Renting a scooter is realistic too: the roads are paved and wider than Ha Giang's, though just as steep, and in the rains writers report mud and washed-out sections.
- Cash is the safe assumption for tickets and meals. Check close to your dates.
- Download offline maps before the falls.
- Give Pac Bo a weekday.
- Be off the road by dark.
- Base yourself in Cao Bang town, which sits on a river island with a riverwalk and a promenade of restaurants.
After the border country
We run nothing in Cao Bang, and our Northern Vietnam, Slowly tour does not go there. What we do is the way back to the coast. Our transfer from Hanoi to Cat Ba takes four to five hours door to door. Or tell us your dates and we draft a tailor-made route through Hanoi, Ninh Binh and Cat Ba, with a written proposal once we know them. For more of the north, see our guide to quieter corners of the north.
What we read for this guide
Trip reports by three independent travellers: Adventures of Jellie, Memoirs of Acacia and The Way To Wherever. We also read UNESCO's page on the Non Nuoc Cao Bang Geopark and the national tourism site's pages on Ban Gioc and the new provinces. Fees, prices and rules change fast, so check close to your dates. If a detail matters to your trip, message us on WhatsApp: if we don't know, we will say so and find out.
Hoang Anh, host at Rustic House
Written on Cat Ba, from Rustic House at 70 Tung Dinh. Questions about your own dates? Ask on WhatsApp.
