Bach Long Glass Bridge sits in Moc Chau district, Son La province, about 200 km west of Hanoi. It opened in 2022, briefly held a Guinness record as the world's longest glass-bottomed bridge at 632 meters, and has since become one of northern Vietnam (베트남 / 越南 / ベトナム)'s more talked-about attractions. Here's what to expect if you go.
What it is
Bach Long — which translates to "white dragon" — is a glass-bottomed pedestrian bridge suspended across a valley in the Moc Chau tourism complex. It hangs roughly 150 meters above the valley floor, connecting two limestone cliff faces. The bridge is part of a larger development that includes ziplines, a via ferrata climbing route, and walking trails through the surrounding karst landscape.
The bridge itself is three layers of tempered glass, each panel about 4 cm thick. It flexes slightly underfoot, which is either thrilling or deeply uncomfortable depending on your relationship with heights. The surrounding scenery — green valleys, tea plantations rolling into limestone ridges — is the real draw. The bridge is just the excuse to get out there.
Why travelers go
Most people come for the novelty of walking on glass above a valley. Fair enough. But the broader Moc Chau area deserves attention on its own. The plateau sits at around 1,000 meters elevation, which keeps temperatures noticeably cooler than Hanoi (하노이 / 河内 / ハノイ). The region is known for tea farms, plum orchards, and a quieter pace that hasn't been fully overrun by tourism yet.
The bridge works well as a day activity within a longer Moc Chau trip, or as a stop on a road trip between Hanoi and the northwest highlands heading toward Sapa or Ha Giang.
Best time to visit
October through March is ideal. Skies are clearer, humidity drops, and the valley views from the bridge are sharper. November and December bring the driest weather.
Late January to early March coincides with plum blossom season across Moc Chau. The hillsides go white and pink, which makes the whole plateau worth visiting beyond just the bridge.
Avoid June through August if you can. Heavy rain and fog can shut the bridge down entirely, and even when it's open, you'll be walking through cloud cover with zero visibility below your feet — which defeats the purpose.
Weekdays are significantly less crowded than weekends. Saturday mornings can see queues of 30-45 minutes. Tuesday afternoon? You might have sections of the bridge nearly to yourself.
Photo by Vietnam Hidden Light on Pexels
How to get there from Hanoi
By bus: Buses to Moc Chau town leave from My Dinh bus station in Hanoi. The ride takes about 4.5-5 hours and costs 150,000-200,000 VND one way. From Moc Chau town, you'll need a taxi or xe om (motorbike taxi) for the remaining 15 km to the bridge complex — around 80,000-100,000 VND.
By motorbike: The ride from Hanoi is roughly 195 km on QL6 (National Route 6). It's a solid 5-6 hour ride with mountain passes after Hoa Binh. The road is in decent shape but has sharp switchbacks in the final stretch. Only do this if you're comfortable with mountain riding.
By private car: Hire a driver from Hanoi for about 2,500,000-3,000,000 VND round trip. This is the most comfortable option if you're splitting costs with others.
What to do
Walk the bridge
Obvious, but worth noting: budget 30-45 minutes for the crossing. Tickets cost 300,000 VND for adults (prices as of late 2024). You'll get shoe covers at the entrance to protect the glass. The middle section, where the valley drops deepest below you, is where most people slow down or freeze. Take your time.
Try the zipline
A dual zipline runs parallel to the bridge, crossing the same valley. It's roughly 600 meters long and costs an additional 200,000 VND. The ride takes about 90 seconds. If the bridge feels too tame, this adds some speed.
Hike the cliff trail
The via ferrata route follows the cliff face with metal rungs, cables, and a suspension walkway. It takes about 1.5-2 hours and requires a guide (included in the 350,000 VND ticket). You need closed-toe shoes. This is genuinely physical and gives you better views than the bridge itself.
Visit a tea plantation
Moc Chau produces some of Vietnam's best green tea. Heart-Shaped Tea Hill (Doi Che Trai Tim) is about 10 km from the bridge — the hedgerows are trimmed into a heart shape visible from above. Free to visit, and there are small tea shops along the road where you can try fresh Moc Chau shan tuyet tea for 15,000-20,000 VND per cup.
Drive to Dai Yem Waterfall
About 8 km from the bridge complex, this wide waterfall is most impressive after rains. The surrounding area has food stalls and a short walking path. No entrance fee.
Where to eat nearby
Moc Chau town has simple local restaurants along the main road. Look for "com binh dan" (everyday rice plates) shops — a full plate runs 35,000-50,000 VND.
Two things to seek out: grilled stream fish (ca suoi nuong) served on bamboo skewers at roadside spots along the route from town to the bridge, and Moc Chau yogurt — the local dairy farms produce a tangy, slightly sweet yogurt sold in small clay pots everywhere for 8,000-10,000 VND each. It's become a regional specialty.
If you're staying for dinner, Son La city (about 60 km further northwest) has more variety, including Thai ethnic minority cuisine with sticky rice, grilled pork, and bamboo-tube rice.
Photo by Quang Nguyen Vinh on Pexels
Where to stay
Budget: Homestays around Moc Chau town run 200,000-400,000 VND per night. Basic but clean, often with mountain views and breakfast included.
Mid-range: A few newer hotels and resort-style guesthouses have opened near the bridge complex, charging 600,000-1,200,000 VND per night. The Moc Chau Eco Garden and similar spots offer private bungalows.
Splurge (by Moc Chau standards): The nicer resorts top out around 1,500,000-2,000,000 VND. Don't expect five-star polish — this is still a rural highland area.
Practical tips
- Bring a light jacket even in summer. The elevation means mornings and evenings get cool, especially November through February when it can drop below 10°C.
- Wear shoes you can remove easily — you'll swap into provided covers on the bridge.
- Charge your phone beforehand. There's no charging station at the bridge, and you'll burn battery on photos.
- Cash is safer than cards out here. ATMs exist in Moc Chau town but not at the bridge complex.
Mistakes to avoid
Coming just for the bridge. If you drive 5 hours from Hanoi, walk across glass for 40 minutes, and drive back, you'll feel shortchanged. Plan at least one overnight to explore the plateau properly.
Weekend visits without booking ahead. Accommodation in Moc Chau fills up on weekends, especially during blossom season. Book a few days in advance or go midweek.
Skipping the via ferrata. Most visitors default to just the bridge walk. The climbing route is more memorable and less crowded. If you're reasonably fit, do both.
Ignoring weather forecasts. Check conditions the morning of your visit. The bridge closes in heavy rain or high winds, and there's no refund policy that works smoothly. A wasted trip is avoidable with a quick weather check.
Last updated · May 22, 2026 · independently researched, never sponsored.
