Plizio Visual Lab
Vịnh Mốc Tunnels

Weather…
Water temperature…
The Vịnh Mốc Tunnels are a remarkable testament to the resilience and survival instinct of the Vietnamese civilian population during the Vietnam War. Located near the Demilitarized Zone (DMZ), the villagers of Vịnh Mốc constructed this complex underground system between 1966 and 1972 to escape massive American aerial bombardments. The tunnel network spans three levels at depths of up to 30 meters and includes living quarters, kitchens, wells, storage rooms, and even a maternity ward. Unlike the Cu Chi Tunnels, which were primarily used for military purposes, Vịnh Mốc served as a permanent refuge for about 300 people throughout the war. The geological composition of the soil allowed for construction without artificial supports, showcasing the engineering ingenuity of the locals. Today, the site is open to visitors, providing a poignant and fascinating glimpse into daily life underground, where 17 children were born during the conflict.
- Location: Vietnam
- Top sights: Cột cờ Cầu Hiền Lương · Tượng đài khát vọng Thống Nhất · Bảo tàng lịch sử Cầu Hiền Lương
- Nearby: Cửa Việt Commune (9 km)
Best time to visit & climate
The most pleasant time to visit is Jan–Mar.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg °C | 20 | 21 | 23 | 26 | 28 | 28 | 28 | 28 | 27 | 25 | 23 | 21 |
| Rain mm | 62 | 29 | 49 | 64 | 114 | 84 | 132 | 202 | 410 | 532 | 283 | 173 |
📋 Practical info
Geography
Facts
- The tunnel system has a total length of nearly 2 kilometers.
- There are 13 entrances, with 7 leading to the sea and 6 to the hills.
- The tunnels were dug into hard clay soil that solidifies upon contact with air.
- The deepest level is located 30 meters below the ground surface.
- Up to 60 families lived in the tunnels simultaneously during bombardments.
- Construction officially began in 1966 and continued for several years.
Explore nearby
Notable places around
Route planner — Car & Motorhome
Where do you start? We build the route here, with stops and country notes along the way.
© OpenStreetMap contributors · OpenRouteService
Sights in the town Vịnh Mốc Tunnels (6)
Sights nearby
Frequently asked questions
Is it safe to enter the tunnels?
Are the corridors very narrow?
Is a guide required?
When is the best time to visit?
What should I bring?
Vịnh Mốc Tunnels: where is it located?
Vịnh Mốc Tunnels: what is there to see?
Vịnh Mốc Tunnels: when is the best time to visit?
Vịnh Mốc Tunnels: why is it worth visiting?












