Joyce, Rippy and I went to the Hague yesterday, to the Escher Museum. It's in a palace, attached as a row house on either side to other buildings, because the Netherlands is like that.
Here's their website, and then a few of my images from the visit. I wish all the photos had been perfect, but there are lights, and glass. Escher in the Palace
My very-unsteady cam:
A little more of that floor: