The brouwery under a windmill is, for me, a must s...

The brouwery under a windmill is, for me, a must see (and a must taste) in Amsterdam. They have all their beers on tap for a good price. On some days, the brouwery offers a guided visit that is very informative and fun but also short.
The windmill is a unique place for a pub but it can become very crowded on some days.

+ taste of the beer.
+ unique location under a windmill
+ guided visit (fun and informative)

- can become crowded
- guided visit (too short)