Bastide du Jas de Bouffan was the Cézanne family estate, and it matters because the painter returned to its rooms, trees, walls, and views again and again. The house and grounds help connect Cézanne's Aix to actual places rather than museum labels, especially for travellers following the city's Cézanne trail.
The visit is most rewarding if you already care about the painter, but even casual visitors get a good sense of the Provençal landscape that shaped his eye. Pair it with the Atelier de Cézanne and views of Sainte-Victoire for a fuller picture of why Aix became inseparable from his work.