One of the most beautiful museums i know (in terms of architecture) is in Den Haag. The architect is H.P Berlage. The superb collection Mondrian paintings couldn’t be more at home as here.

Somewhat outside of the city but worth the lil trip 

great restaurant & wine bar with a focus on seasonality and simplicity The wine list consists of all European and bio-dynamic wines

Great exhibition space for contemporary art.

For indpendent art spaces and young galleries you have to go to the area around the Boekhorststraat. For more details go here.