The best and biggest flowershow on earth. Tulips.
Only 30 minutes by train you can find Holland's best beach: Zandvoort. At Zandvoort you will find a nice big beach, good restaurants and loverly terraces:
Say cheese. In Alkmaar you will find the oldest, still operational cheese market of Holland. The hostess of Guesthouse Amsterdam was born here!
In Rotterdam you will find the worlds largest harbour (until 2004, but it's still big). The city of Rotterdam is famous for its modern architecture.
Den Haag (The Hague) is the seat of the Dutch government. Very nice old architecture and the center of Dutch politics.
Very sweet old fishermansvillage (also a bit of a tourist trap).