I (and someone else too) already mentioned the Kröller-Müller elsewhere, but if you're in the Netherlands anyway, I'd recommend the Mauritshuis as well, and clo

I (and someone else too) already mentioned the Kröller-Müller elsewhere, but if you're in the Netherlands anyway, I'd recommend the Mauritshuis as well, and close to it is also the Escher museum if you're into that. I assume the Rijksmuseum is already crossed off :)