Kinderdijk windmills

a row of dutch kinderdijk windmills in twilight at kinderdijk polder

Kinderdijk, about 10 miles southeast of Rotterdam, is certainly one of the most popular sights in Holland.
Completely accessible by water from Rotterdam by public transport company ‘Blue Amigo Waterbus’.
The nineteen enchanting windmills belong to the UNESCO World Heritage and were built in the 18th century to prevent flooding of the Alblasserwaard polder.
The function of historic windmills is nowadays taken over by a modern pumping station. The water is pumped up with three large augers, powered by diesel engines. The capacity is 400000 US gallons per minute. This way an excess of water can be drained quickly into the major rivers.

https://www.holland.com/global/tourism/destinations/provinces/south-holland/the-windmills-of-kinderdijk.htm