A Windmill Tour of North Holland
Drive north from Amsterdam and within half an hour the land flattens into a grid of ruler-straight canals, pastures, and the occasional cluster of windmills standing sentinel on the horizon. This is North Holland, a province where the ground beneath your feet was, in many places, once open water. The windmill did not just decorate this landscape; it built it, pumping lakes dry to create farmland and, in the Zaan region, grinding, sawing, and pressing raw materials for one of the earliest industrial economies in Europe. A tour of North Holland's mills is really a tour of two different windmill traditions working side by side for centuries: drainage and industry.
A province reclaimed from water
Much of North Holland sits below sea level, protected by dikes and dunes and kept dry only through constant pumping. Long before steam or electric pumps existed, that job fell entirely to wind. Starting in the late medieval period and accelerating through the seventeenth century, the Dutch developed a system for turning shallow lakes into farmland: encircle the lake with a ring canal and dike, then use windmills to lift the water out of the lake basin and into the surrounding canal, from where it could eventually reach the sea or a larger reservoir. The reclaimed land, lying below the water level around it, became known as a droogmakerij, or "made-dry" polder. North Holland has some of the finest surviving examples of this practice anywhere in the country.
The Beemster, a landmark reclamation
Among the earliest and most celebrated of these projects is the Beemster, a lake north of Amsterdam that was drained in the early seventeenth century. The project was notable not only for its scale but for the discipline of its planning: the reclaimed polder was laid out as a rational grid of roads, canals, and rectangular fields, a striking departure from the organic, unplanned settlements typical of the era. That geometric clarity, combined with the survival of its historic farms and villages, later earned the Beemster recognition as a UNESCO World Heritage Site. The drainage of the Beemster relied on rings of windmills working continuously to keep the newly exposed land dry, a pattern that would be repeated across the province.
Jan Adriaenszoon Leeghwater and the engineering of dry land
No name is more closely associated with North Holland's reclamation projects than Jan Adriaenszoon Leeghwater, a hydraulic engineer and millwright whose surname, fittingly, translates roughly as "empty water." Leeghwater was involved in draining the Beemster and later worked on the Schermer, another large lake north of Alkmaar that was reclaimed in the following decades. His approach relied on chains of windmills, known as molengangen, arranged to lift water in stages rather than all at once. A single mill could only raise water a limited height before losing efficiency, so engineers stacked several mills in sequence: the first mill lifted water from the polder floor to an intermediate level, a second mill lifted it further, and so on until the water reached the boezem, the regional network of canals that ultimately discharged to the sea or to what is now the IJsselmeer. Several of the Schermer's historic drainage mills survive today near Schermerhorn, still arranged along the routes their builders chose four centuries ago.
Inside a drainage mill
The drainage windmills of North Holland are typically octagonal smock mills, their wooden or thatched bodies mounted on a brick or timber base and topped by a rotating cap that lets the sails face into the wind. Turning the cap, or in older designs turning the entire mill body on a post, was heavy manual work done by the miller with a long tailpole, and it had to be repeated every time the wind shifted. Inside, the rotation of the sails drove a horizontal shaft connected through wooden gearing to either a scoop wheel, essentially a paddle wheel that flung water upward and outward, or an Archimedean screw, a large corkscrew-shaped device that carried water up a sloped channel. Millers also had to reef the sails, wrapping or unwrapping cloth on the wooden lattice frames, to match the mill's power output to the strength of the wind and the amount of water that needed moving.
The Zaan region's industrial windmills
While drainage mills kept the land dry, a different kind of windmill turned North Holland into an early industrial powerhouse. The Zaanstreek, the area along the Zaan river just north of Amsterdam, became home to an extraordinary concentration of wind-powered factories from the seventeenth century onward. Sheltered from the open sea yet close to Amsterdam's harbor and shipyards, the Zaan region used windmills not to pump water but to drive machinery: saw frames that cut imported timber into planks for shipbuilding, stamps that pressed oil from seeds such as rapeseed and linseed, mills that ground pigments for paint, and others that produced paper, mustard, or spices. Because these industrial mills needed to catch as much wind as possible above the surrounding buildings, they were often built taller than drainage mills, sitting on substantial brick bases. For a period, the Zaan district is thought to have contained one of the densest clusters of windmills anywhere in the world, feeding materials directly into the Dutch shipbuilding and trading economy of the era.
Zaanse Schans and the mills that still work
Today, much of that industrial mill heritage is gathered and preserved at Zaanse Schans, an open-air museum village on the banks of the Zaan where historic houses, warehouses, and windmills from across the wider region were relocated and restored. Several of its windmills remain fully operational, run by millers who still adjust sails to the wind exactly as their predecessors did. A paint mill continues to grind pigments, an oil mill presses seeds much as it would have centuries ago, and a mustard mill grinds mustard seed the traditional way, with the finished products sold on site. Watching the great sails turn overhead while gearing rattles and grinds below gives a far more visceral sense of how these machines worked than any photograph can, and it is one of the reasons the Zaan windmills remain such a popular stop for visitors tracing the history of Dutch wind power.
Preservation in a changed landscape
The mills that survive in North Holland today are the remnant of a far larger population. As steam power, and later electric and diesel pumps, took over the work of drainage through the nineteenth and twentieth centuries, most polder mills lost their original function, and many were dismantled or left to decay. The industrial mills of the Zaanstreek faced the same pressure as steam-driven factories replaced wind-driven ones. The mills that remain owe their survival to a combination of local pride, heritage protection, and the deliberate work of relocating threatened mills to safer sites such as Zaanse Schans. Many are now protected as national monuments, maintained by dedicated millers and volunteer associations who keep the sails turning even though the mills no longer need to work for a living. That maintenance is not simple upkeep: thatched roofs need periodic renewal, wooden gearing wears and must be replaced in kind, and the sails themselves require regular reefing and repair, skills that are now actively taught to keep the tradition from dying out with the last generation of professional millers.
Explore on the map
North Holland rewards a slow route rather than a single stop, since its drainage mills and industrial mills sit in different corners of the province and tell different halves of the same story. The interactive map plots the region's windmills together so you can see how the Zaanstreek's industrial mills relate to the drainage chains around the Beemster and Schermer, and plan a route that links polder, factory, and open water in a single day.