The 816 Nuclear Military Plant is one of the strangest and most impressive sights in the Chongqing region. Built in the 1960s as part of China's Third Front programme, which moved sensitive industry into the remote interior, it was hidden inside a mountain in Fuling district and kept secret for decades. Its enormous caverns, tunnels and control rooms were carved out of solid rock, and the site is sometimes described as one of the largest man-made caves in the world. It was later decommissioned and opened to visitors, who now tour the tunnels, reactor halls and control rooms with a guide. The experience is a sobering and fascinating lesson in Cold War history, engineering and secrecy. The tour we link is a private tour to the plant from Chongqing, so a guide and transport are handled for you, though the journey from the city is long. Expect a lot of walking in cool, damp corridors, and check the practical details, since access rules and opening days can vary and some sections may be closed.
How to visit
The site is in Fuling, a couple of hours or more from central Chongqing, so a private tour is the easiest way. Check the tour details for the pick-up, the entry ticket, the transport time, the language of the guide and whether any lunch is included. Bring ID for entry and expect security checks.
What to expect
You walk through a network of tunnels and halls, with industrial equipment, control rooms and exhibits about the Third Front and the workers who built the site. The interior is cool and sometimes damp year-round, so a light jacket is useful even in summer. Parts of the route are long and involve stairs, and lighting is dim in places.
Making the most of it
Wear comfortable shoes and take a jacket. A guide provides context, since many displays are in Chinese. If you have a strong interest in industrial or Cold War history, combine the visit with other sights in Fuling, depending on the tour. Allow a full day, because the travel time is long.
Combine it sensibly
Some tours link the plant with other Fuling sights, such as the Baiheliang underwater museum or the Wuling Mountain area. Because it is a long trip, plan it as a main event for the day rather than adding other big sights.
What to expect
The experience
A private full-day trip to a decommissioned underground nuclear plant, with a guide and transport.
Best time
Any season, since the interior is sheltered, but dress for cool, damp tunnels.
How long
A full day, including a long drive each way.
Tips
Bring ID, wear comfortable shoes and take a light jacket.
Quick picks
- Best for
- History and engineering lovers who want an unusual, off-the-beaten-track site.
- Families
- Older children interested in history may enjoy it; the day is long.
- Couples
- A shared, offbeat adventure for curious couples.
- Pair with
- Another Fuling sight, if your tour includes it.
- Time needed
- A full day.
Good questions
What is the 816 plant?+
It is a former secret underground nuclear facility built inside a mountain in the 1960s as part of the Third Front programme.
Is it open to visitors?+
Yes, it opened to visitors after decommissioning, though access rules and opening days can vary.
How far is it from Chongqing?+
It is in Fuling district, a couple of hours or more by road from central Chongqing.
What should I wear?+
Comfortable shoes and a light jacket, since the tunnels are cool and sometimes damp.
Do I need ID?+
Yes, bring your passport, as security checks and ID checks are common at the entrance.