I guess I would second the Halve Maan tour...though my last time was maybe 20 years ago. It looks like they have changed it since, plus they now brew again at that location, but the building itself was sort of a time capsule, having quite a bit of old equipment, a malting floor, mills, a complete brewery from a hundred years ago. It still ranks as one of the better tours I have been on, typically they are heavy on beer memorabilia, with a little bit on brewing, but very little actually seeing the equipment in place, and if brewing, usually on small scale modern equipment.