Two heritage sites, two different jobs
Both are full of windmills. Almost nothing else about them is the same.

Kinderdijk — the drainage machine
A working flood-defence system that happens to be beautiful: 19 mills that pumped the Alblasserwaard polder dry for two centuries. Most are private homes today — you look from outside, and step inside just two.

Zaanse Schans — the working museum
A curated village of real working mills, moved here from around the Zaan region starting in 1963. You can watch paint, oil, and mustard actually being made the way they were three centuries ago.