Kasteel Grasbroek in Sittard-Geleen

You're standing at Grasbroek Castle, between the villages of Born and Guttecoven. Don't expect a huge fortress. This is a small, rectangular house with two storeys and a cellar underneath. But take a good look at the two gables. They curve in and out, and between them they have no fewer than sixty-three loopholes. That's quite a lot of firepower for such a modest house.