Hannekes Boom is one of the nicest waterfront café in Amsterdam to have a beer when it's sunny. Close to Central Station, the place isn't crowded by tourists, but you need to be there early to get a seat.
A theatre hidden in the man made forest on the outskirts of Amsterdam. An impressive setting with impressive shows. Watching an interesting piece under the stars is quite a memorable experience. Further more it's a nice bike ride leading you past rowing waters, fields to play picnic in or a pancake house if you feel like something warm and sweet.