Before the Vietnam War transformed the region, Vịnh Mốc was a quiet fishing village on Vietnam’s central coast, surrounded by rice paddies, bamboo and beaches. But its location near the dividing line between North and South Vietnam placed the community in the path of intense wartime bombardment. Over eight years, an estimated 9,000 tons of explosives were dropped on the village. With escaping the area considered too dangerous, residents found another solution: they moved their community underground.
A Peaceful Village Becomes a Target
Before 1965, daily life in Vịnh Mốc revolved largely around fishing and agriculture. That changed as the Vietnam War intensified.
The village’s position near the Demilitarized Zone made the surrounding region strategically important. Vịnh Mốc was close to supply routes used by North Vietnamese forces, and the area became the target of repeated American bombing.
The scale of the attacks was extraordinary. Over approximately eight years, an estimated 9,000 tons of explosives were dropped over the village and surrounding area.
For the people living there, remaining in ordinary homes became increasingly dangerous. Yet attempting to relocate while the area was under constant bombardment carried serious risks of its own.
“Leaving wasn’t an option—constant shelling made it too dangerous, and staying above meant risking everything,” Văn Ngọc Vũ, a guide and director of Annam Tour, explained. “Going underground was the only way to survive.”
Building a Village Beneath the Earth
Rather than abandon their community, villagers began constructing an extensive network of tunnels beneath Vịnh Mốc.
Work started in the 1960s and was carried out largely with basic tools and human labor. The project eventually developed into a sophisticated underground settlement designed not simply as a temporary shelter, but as a place where people could continue living during prolonged periods of bombing.
The tunnels included arched ceilings, thick earthen walls and zigzagging passageways designed to help absorb the force of explosions.
The underground network was built at multiple depths, allowing residents to move deeper below the surface when necessary. Entrances also provided access to different parts of the village and helped circulate air through the complex.
Life Continued Below Ground
The tunnels became much more than bomb shelters. They effectively transformed into an underground village.
Living areas were carved into the walls for families, while other sections were created for cooking, storing supplies, receiving medical care and holding community gatherings. Wells provided access to water, while ventilation systems helped make extended periods underground possible.
Life there was still extremely difficult. Residents dealt with cramped spaces, humidity and limited exposure to sunlight. Yet the tunnels gave hundreds of people a place to continue their lives while attacks continued overhead.
For roughly six years, hundreds of residents spent significant periods beneath Vịnh Mốc during the bombardment.
A New Generation Born Underground
Perhaps one of the most remarkable parts of Vịnh Mốc’s story is that life did not simply survive underground. It continued into a new generation.
The complex contained a maternity area where women could give birth while protected from the fighting above. At least 17 children were born inside the tunnels.
Families slept, ate and raised children beneath the earth while explosions struck the landscape overhead. Weddings and other parts of community life also continued despite the extraordinary circumstances.
The underground complex demonstrated how an emergency shelter could evolve into a functioning community when residents had no safe alternative.
Engineering Survival Under Fire
The design of Vịnh Mốc was critical to its survival.
Instead of constructing straight passageways that could allow the force of an explosion to travel through the network, builders incorporated turns and zigzagging corridors. The thick surrounding earth provided additional protection.
The network eventually developed into several underground levels containing different spaces and functions. Some entrances faced toward the sea, helping with ventilation and giving residents additional ways to enter or leave the complex.
The tunnels were also connected to the wider wartime effort in the region, with the area serving as an important location for storing and moving supplies.
What began primarily as a way to protect civilians ultimately became one of the most remarkable underground complexes built in Vietnam during the war.
From Wartime Refuge to Historic Landmark
Six decades later, Vịnh Mốc looks dramatically different.
Bamboo once again grows around the village, restaurants serve visitors and ordinary life has returned to the coastline. Yet entrances in the landscape still lead into the underground world that helped the community survive.
The Vịnh Mốc tunnels have been preserved as a historic site, allowing visitors to walk through portions of the passages and see the spaces where families once lived.
The peaceful surroundings create a stark contrast with the village’s wartime history. What is now a destination for visitors was once a refuge built because the people above ground faced relentless danger.
A Lasting Story of Survival
The story of Vịnh Mốc is ultimately one of adaptation under extraordinary circumstances. Faced with years of bombardment and few safe options, residents transformed the earth beneath their village into homes, medical spaces, storage areas and community facilities.
Thousands of tons of explosives changed the landscape above them, but the underground network allowed hundreds of people to endure one of the most destructive periods in the region’s history. Today, the surviving tunnels preserve the story of a community that responded to devastation by building an entirely new world beneath its feet.
