Sticking to the topic of Dutch star architects already touched yesterday, I would like to mention today another building worth seeing: the Techinsche Universiteit (TU)'s library in Delft.
Built at the end of the Nineties by Mecanoo, the world renown architects' practice based in Delft itself, it has a curios slope-like structure and a roof covered with grass.
It makes for the perfect picnic spot in Summer (when there is one), while in Winter, given the lack of hills in the country, it's used by snowboard-fanatic students to practice their tricks.
Inside, floor to ceiling book shelves line the walls and several study rooms and facilities are available. It's open every day of the year from 8.00 to 24.00.