How the Netherlands Lives Below Sea Level and Doesn’t Go Underwater

Imagine a country where one-third of its territory lies below sea level.

A place where the largest airport, receiving tens of millions of passengers each year, is situated on the bottom of a former lake, four meters below the ocean’s surface.

In fact, the lowest point in this nation is nearly seven meters below wave level.

By all the laws of nature, this country should be a seabed, and if one day all the pumps were turned off, that is precisely what it would become.

Water would begin to return within days.

Yet, in this improbable territory, nearly 18 million people live and thrive.

Cities flourish, fields bloom, and this country ranks among the richest on the planet.

This is the Netherlands—a nation that has waged war against the sea for over a thousand years and, astonishingly, is winning.

The Dutch Struggle with Water

Today, we delve into how the Dutch have literally built their country with their own hands.

We will explore the workings of the world’s most sophisticated water protection system.

We will remember the fateful night when the sea finally broke through and claimed thousands of lives.

Additionally, we will debunk the well-known myth about the boy who plugged the dam with his finger.

Finally, we will reveal why, in recent years, the Dutch have begun to return land to the sea that they had fought so hard to reclaim.

There is an old saying in Europe: “God created the world, but the Dutch created the Netherlands.”

This saying might seem like a joke, but it holds a kernel of truth.

To understand this, we must first look at what this land was originally like.

The Origins of the Netherlands

The name “Netherlands” translates to “Lowlands.”

It is a vast delta where several major European rivers, including the Rhine, flow into the North Sea.

For thousands of years, these rivers carried silt and sand, leading to the accumulation of thick layers of peat on the marshy plains.

The result? A flat, damp, spongy land that barely emerges from the water—a kingdom of swamps, channels, and tides, which the sea regularly floods.

When the Romans arrived in these lands, they were astonished and pitied the local inhabitants, viewing them as unfortunate people living on miserable hills surrounded by water, scavenging for firewood washed ashore by the tide.

These hillocks, artificial mounds known as terps, were the first ingenious invention of the local residents.

Unable to halt the floods, the people simply raised their homes and villages above the water, piling up mounds basket by basket.

Hundreds of these ancient hills remain today, many still hosting churches and farms.

Thus, around 2,000 years ago, the great dispute between this people and the sea began.

From Defense to Offense

About a thousand years ago, the Dutch shifted from a defensive posture to an offensive one.

Instead of hiding in the hills, they began enclosing entire tracts of land with ramparts.

This marked the birth of the first dams and weirs, along with a crucial form of self-governance.

The dam protects everyone living behind it; a breach in the land of one owner could drown their hardworking neighbors.

As a result, residents began to unite into water councils—elected bodies that oversaw the dams, collected taxes for their maintenance, and could compel anyone, from peasants to noblemen, to fulfill their duties of water protection.

These water boards still exist today and are considered the oldest democratic institutions in the Netherlands, predating the Dutch state itself.

The Role of the Dambovy Count

The head of such a council holds a title that sounds like something out of a medieval novel: the Dambovy Count.

Elections for these councils are still held alongside parliamentary elections.

The Dutch take their water management seriously and vote for those who will oversee their dams and water.

For centuries, there was a special duty that every resident had to fulfill.

In times of threat, each individual was obliged to come to the defense of the dam.

This “dam army” of local volunteers still exists today.

During major storms, caretakers patrol the waves, looking for leaks, just as their ancestors did centuries ago.

Historians believe that the famous Dutch traits—such as negotiation skills, compromise, and teamwork—were forged in the crucible of water.

After all, in the face of a flood, class divisions and strife become irrelevant.

The dam is either there or it isn’t.

The Windmill: A Symbol of Dutch Ingenuity

Interestingly, the sea has played a significant role in shaping the national character.

However, keeping water out is only half the battle.

It was also necessary to remove what accumulated inside: rain, river floods, and seeping moisture.

This is where the windmill, the main symbol of the Netherlands, comes into play.

While we typically think of mills as grain grinders, in Holland, many windmills served a different purpose: pumping water.

The windmill turned a wheel or propeller, lifting water from low-lying areas and pouring it over the dam into canals, which then flowed back to the sea.

This invention became the foundation of the entire country: the polder.

A polder is a piece of land reclaimed from the Earth’s waters, surrounded by a dyke and drained by canals and pumps, governed by a simple but relentless rule: water must be pumped continuously, forever, without weekends or holidays.

If the pumps stop, the land reverts to its former state.

The Drainage of Lakes

Beginning in the 15th century, the Dutch began draining entire lakes with polders.

Dozens of mills lined up in a chain, raising water step by step.

This process transformed water surfaces into arable land and villages.

One notable example is the drainage of the vast Haarlemmermeer lake, which is now home to Amsterdam’s Schiphol Airport.

The name of the airport serves as a reminder of its watery past, as ships once sank in those depths.

Today, you can still see the old Dutch water engines in action in the town of Kinderdijk, where a legendary line of 15th-century mills along the canals has been preserved.

This landscape is recognized as a World Heritage Site and is one of the most iconic vistas on the planet.

Modern Solutions to an Age-Old Problem

However, the primary work of water management has not been done by windmills for quite some time.

Thousands of modern pumping stations, ranging from tiny automatic systems to giants capable of pumping entire rivers, operate around the clock throughout the country.

Together, they expel staggering volumes of water from the country into the sea every day.

Holland is essentially a giant bathtub from which the water is constantly bailed out.

However, there is a hidden downside to this monumental construction project.

As peat dries out, it shrinks and settles, causing the ground to sink lower and lower.

This creates a vicious cycle: the more the Dutch drain their land, the lower it sinks, necessitating even more dams and pumps.

There appears to be no escape from this trap—only perpetual labor.

Since the country exists in a constant relationship with sea level, the Dutch established a standard for themselves centuries ago: the Amsterdam M zero.

This mark represents the average water level from which all heights and depths in the country are measured.

Over time, it became a reference point for altitude in many European countries.

When someone in Germany or Austria notes their height above sea level, they are unknowingly measuring it from the water level in Amsterdam.

The small, marshy country has effectively set the continent’s coordinate system.

The 1953 Flood Disaster

For centuries, this system held strong, but the sea remained a constant reminder of who was truly in charge.

On the night of February 1, 1953, a severe storm and high spring tide converged on the North Sea.

Hurricane-force winds propelled water toward the shore, raising sea levels several meters above normal.

Unfortunately, the old dams, weakened by war and years of neglect, could not withstand the onslaught.

In the darkness, the storm surge broke through defenses in multiple locations, inundating the sleeping villages of the southwestern provinces.

People awoke to icy water pouring into their bedrooms.

Families took refuge in attics and on roofs, while homes—old brick structures not designed to withstand the waves—collapsed under pressure, taking entire families with them.

Communication lines were severed, and radio stations fell silent.

Many communities struggled in isolation, unaware that a disaster had spread across half the country.

In the early hours, communication with the cut-off areas was maintained largely by amateur radio enthusiasts who relayed calls for help.

Those who could rescue others from rooftops—fishermen on boats, soldiers in amphibious vehicles, and helicopters—worked tirelessly.

Aid poured in from around the world.

In the aftermath, more than 1,800 people lost their lives, along with countless animals, and many thousands were left homeless.

Vast territories lay submerged.

For this small country, it was a shock comparable to war.

The Heroic Response

The night was filled with stories worthy of a separate film.

One tale, unlike the fairy tale of the boy with the finger, is absolutely true.

When water broke through a dam protecting a densely populated area, a flood threatened to inundate cities with millions of residents.

The mayor of one town persuaded a local skipper to take the desperate step of plugging the breach with his own vessel.

The captain steered his old barge straight into the roaring breach, and the hull of the vessel wedged itself in the hole, blocking the flow and buying time for workers to shore up the dam with sandbags.

One man on one barge essentially saved the most populated area of the country from flooding.

Just weeks after the tragedy, a state commission was formed, issuing a historic verdict: this must never happen again, no matter the cost.

Thus, the most ambitious engineering project in the country’s history—and perhaps all of Europe—was born: Plan Delta.

The Delta Plan

The Delta Plan is a system of colossal structures designed to block sea branches and river mouths in the southwest of the country.

Tens of kilometers of new dams, locks, barriers, and weirs took decades to construct.

The American Society of Engineers later recognized these structures as one of the Seven Wonders of the Modern World, and rightly so.

Among these engineering marvels are two standout projects.

The first is the Oosterschelde barrier, a nine-kilometer structure composed of gigantic concrete supports with steel shields suspended between them.

Initially, the plan was to seal the bay with a dam, as was done with other branches.

However, fishermen and the burgeoning environmental movement objected.

A blind dam would destroy the bay’s unique tidal ecosystem, including its famous oysters, mussels, and bird colonies.

The resulting dispute divided the nation, ultimately leading to a compromise that cost many times more than a simple dam: a movable barrier.

During normal conditions, the shields are raised, allowing the sea to flow freely and preserving the bay’s unique nature.

However, when a storm threatens, the shields lower, sealing off the bay from the sea.

This project marked a significant moment in history, as it was the first instance of an engineering structure of such scale being redesigned for environmental reasons.

The Maaslandkering Barrier

The second marvel is the Maaslandkering barrier, which protects the port of Rotterdam, the largest in Europe.

A conventional dam could not block the shipping channel through which ocean giants pass.

Instead, engineers devised a solution that seems straight out of science fiction: two giant floating shells, each the size of the Eiffel Tower lying on its side.

These shells normally rest in docks along the shore.

When a computer system—constantly monitoring sea and weather conditions—predicts a dangerous rise in water level, the gates float towards each other, close across the canal, fill with water, and sink to the bottom, sealing Rotterdam from the sea.

Each operation halts the work of the continent’s largest port and costs the economy a fortune.

Thus, the bar was set high for when to close the barrier.

Throughout history, it has only been closed in combat a handful of times, and every autumn, it is ceremoniously closed during drills.

Crowds flock to witness this ballet of steel giants in action.

The decision to close the barrier is made automatically, without human intervention, as the cost of error is too high.

The temptation to hope for the best is simply too human.

A New Philosophy of Safety

Alongside concrete and steel, the Delta Plan gave rise to a new philosophy of safety.

The Dutch were the first in the world to establish by law the probability with which their defenses could fail.

For the most populated areas, dams are designed to withstand a storm that occurs on average once every 10,000 years.

Consider this number: the last time something like this could have happened was before humanity invented writing.

No other country makes such stringent demands on its defenses.

In contrast, many nations design their dams for events that recur every 100 or 200 years.

Every dam in the Netherlands is included in a register, regularly inspected, and reinforced at the slightest deviation from standards.

This meticulousness represents the Dutch response to the sea—not heroism in the face of disaster, but boring, meticulous, endless preventative maintenance.

The Zuiderzee Project

Even before Plan Delta, the Dutch undertook an operation that could be described as the re-creation of geography.

In the north of the country, the Zuiderzee inlet posed a flood threat to central provinces for centuries.

At the beginning of the 20th century, the Dutch decided to tackle the issue head-on.

They simply closed the sea with a 32-kilometer dam, the Afsluitdijk, along which a motorway now runs.

The salty bay, cut off from the ocean, gradually transformed into the freshwater lake IJsselmeer.

However, this triumph came at a cost, one not borne by engineers, but by fishermen.

Villages that had thrived around the Zuiderzee, reliant on the sea for herring and eel, suddenly lost their livelihoods.

An entire culture, complete with its own customs, boats, and way of life, became part of history.

The former island of Urk, once a proud fishing community in the middle of the sea, found itself surrounded by fields instead of water.

Today, it is perhaps the only fishing port globally that sits amidst farmland.

Yet, its inhabitants have not given up; they still venture out to sea through locks to fish.

The Rise of Flevond

As time passed, something incredible occurred.

On the bottom of the former sea, the Dutch began building polders and creating new land.

Thus, the province of Flevoland, the largest man-made island on the planet, emerged from the water.

Today, hundreds of thousands of people reside there, with the capital built on the site of a sunken warship from the 15th century, discovered during the drainage process.

This is not an isolated incident.

While draining the former bay, archaeologists unearthed the remnants of hundreds of ships from various eras, from medieval fishing boats to merchant vessels of the Golden Age.

Flevoland is now known as the world’s largest land-based ship graveyard.

Local farmers sometimes unearth ancient shipwrecks while plowing their fields, walking on the seabed, riding bicycles across it, and cultivating the famous tulips that bloom in abundance.

Debunking the Myths

Now, let’s address the famous myth that often accompanies stories about Holland: the legend of the little boy who noticed a leak in a dam and plugged the hole with his finger, standing guard all night to save the country.

This tale is regarded as an ancient Dutch legend.

However, the Dutch themselves had not even heard of it for centuries.

The truth is that the boy with the finger was invented by an American writer in the 19th century.

An episode from her children’s novel about Hans Brinker spread worldwide, leading generations of American and European schoolchildren to believe it was genuine Dutch folklore.

Tourists arriving in the Netherlands often asked where the monument to the boy hero was.

In a practical response, the Dutch eventually erected several statues specifically for their visitors.

This is a rare case where a myth invented overseas was materialized in bronze in a homeland with no connection to it.

The irony is that, from an engineering standpoint, the story is nonsensical.

If a dam has a leak, a finger won’t save it.

As water finds its way, it washes away the hole with each passing minute.

The real heroes of the Dutch struggle against the sea are not fairy-tale boys, but thousands of nameless builders, dam keepers, and engineers who have tirelessly performed their duties for centuries.

The Reality of Amsterdam

At the same time, another popular myth—that Amsterdam is built on water, like Venice—has been debunked.

Amsterdam stands on stilts.

Millions of wooden, and now concrete, posts have been driven through the soft soil to reach the hard sand layer.

The entire old city rests on these supports, including the royal palace, which is underpinned by more than 13,000 of them.

The central station was constructed on artificial islands made from thousands of piles.

The Dutch even joke that Amsterdam was built on herring bones, suggesting that the city’s wealth, which funded all those piles and canals, originated from the fish trade.

Moreover, for accuracy, it’s essential to clarify that not all—or even half—of the country lies below sea level.

Approximately one-third of the territory is below sea level, but without dams and pumps, nearly two-thirds would face regular flooding.

This is where the majority of the population lives and where the lion’s share of the economy is generated.

Thus, the dependence on protection is total, even if the formal figures are more modest than the myths suggest.

A New Approach to Water Management

It would seem that the story concludes with a happy ending.

The country is fortified, and engineering wonders stand guard.

Life goes on, and happiness prevails.

However, in recent decades, the Dutch have made an unexpected turn.

They began returning land to the water.

This may sound like capitulation, but it is a calculated decision.

Climate change is raising sea levels and intensifying storms and river floods.

Engineers recognized that it is impossible to construct dams indefinitely.

The higher the wall, the more severe the consequences of its breach.

A new philosophy emerged: instead of fighting water, negotiate with it.

Under the program dubbed “Room for the River,” dams have been relocated inland in numerous areas, creating floodplains for rivers.

This allows the water to spread during floods without threatening cities.