You may like it or not, Amsterdam made a lot for legal prostitution. The history of this red-light districts dates back even in the Middle Ages.
Is not at all the season of the tulips but in this valley you can see the last (operating) windmills of the Netherlands.
It is reported that there were more than one thousand windmills along the river. Besides flour, they were used to pulverize minerals.
The Rijksmuseum is the national Dutch museum, but the works of Van Gogh are in another structure. Where is written "I amsterdam" is probably the most spotted place for photo in the city.
The houses in Amsterdam are very narrow since, in in ancient times, the taxes were paid on the basis of the occupied surface.
The silence of some canals compensate the sound of others.