4.7/5
China – Chongqing
816 Project is one of the largest underground military-industrial sites in China. Known for its mysterious cavern structure, massive underground factory halls, and unique historical background, it stands as one of Chongqing’s most striking and educational industrial heritage attractions.
Built deep inside a mountain, the entire complex features vast and intricate interior spaces. The scale and engineering reflect the capabilities of a special era in Chinese history. Today, 816 Project offers visitors a rare opportunity to explore a hidden Cold War–era facility. It is especially appealing to families, history enthusiasts, and travelers interested in military architecture and industrial heritage sites in Chongqing.
Opening Hours: Daily 09:00–17:30. Operating hours may vary due to seasonal adjustments, public holidays, or maintenance arrangements. Check the official website before your visit for the latest updates.
Recommended Visit Duration: Plan for half a day to a full day (approximately 3–5 hours). This allows enough time to explore the main cavern spaces and exhibition areas.
Best Time to Visit: Weekdays during spring and autumn (March–May and September–November) offer the most comfortable experience. The weather is pleasant, and visitor numbers are generally lower.
Additional Notes:
Reserve tickets online in advance to ensure smooth entry.
Present a valid ID and your reservation confirmation (e-ticket) at the entrance.
The site is entirely underground. Temperatures can feel cooler, and there are many stairways. Wear comfortable, non-slip shoes and bring a light jacket.
816 Project receives strong reviews from visitors. Many guests are impressed by the enormous underground chambers and the dramatic industrial structures carved into the mountain. The maze-like tunnels and towering cavern halls create a powerful sense of mystery and historical weight.
The experience feels immersive and thought-provoking, making it suitable for families and groups of friends. However, the site covers a large area, and walking distances can be long. Some sections also have dim lighting. Planning your route in advance and allowing sufficient time will help you enjoy the visit more comfortably.
Looking to plan your visit to 816 Project more efficiently? We’ve prepared a comprehensive visitor guide that includes a structural overview map, highlights of must-see cavern halls, and background information about the project’s history.
In addition, consider combining your visit with Chongqing’s mountain city scenery or nearby natural attractions. By pairing industrial heritage exploration with local sightseeing, you can experience a different side of Chongqing’s history and landscape.
Q: Can I buy 816 Project tickets onsite on the same day?
A: Yes, onsite ticket purchases are generally available. However, tickets may sell out early during holidays and peak seasons. Booking through official or authorized platforms in advance is recommended.
Q: Can I bring food and drinks into the site?
A: Outside food is generally not recommended. Certain areas may restrict eating and drinking. Please follow on-site regulations and posted notices.
Q: Are guided tours available inside the site?
A: Yes, the site offers scheduled guided tours and audio guide services. Visitors can inquire at the entrance for more details to better understand the project’s historical background.
Q: Is 816 Project suitable for young children?
A: Yes, but due to the large underground spaces and numerous stairways, parents should accompany children at all times and prioritize safety.
Q: How much time should I allow for the visit?
A: Most visitors spend about 3–5 hours exploring the site. If you plan to study the exhibitions in depth or join a guided tour, consider allowing additional time.
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