If you talk about windmills, talk about The Netherlands. Of all the old and historic windmills that exist today, about 1,200 are in The Netherlands — that is more than any country in the world. The oldest mill recorded is a watermill that dates back to the eighth century.
The most famous windmills of Holland via holland.com:
Kinderdijk is the most famous group of polder mills and is World Heritage listed. This UNESCO site with nineteen mills gives you a great impression of how floods were prevented. Besides being home to this creative form of water management, Kinderdijk is a wonderful, picturesque area.
The mills of Schiedam are the five largest windmills in the world. These gigantic windmills, some over 40 meters high, played an important role in the production of jenever (Dutch gin). Instead of reclaiming land, these smock mills (a type of industrial mill) were used grind grain.
Last but not least, you should visit Zaanse Schans. Some 250 years ago, well over 600 mills formed the first industrial site in the world. They performed a wide range of industrial duties, such as producing shelves, paint, mustard, oil and paper. Today it’s an open-air conservation area and museum, which attracts thousands of visitors each year.