Kasteel Nieuwenhoven sits a couple of kilometres north of the town centre, in a wooded park that gives no hint of what lies within. The castle itself is an elegant mix of Gothic and Renaissance stonework, with a formal garden, a historic dovecote, and a collection of outbuildings that have found new life as artists' studios.
The estate operates as an evolving arts community, and visits can feel pleasantly unpolished — you might stumble upon an exhibition, a workshop, or simply an artist at work. It is worth the short bike ride or taxi from the centre, especially combined with a walk through the Haspengouw farmland between Sint-Truiden and the castle.