Hôtel Château d'Eau In the heart of the 10th arrondissement, in the Faubourg Saint-Denis district, the Touriste group has opened the doors to its latest four-star establishment: the Hôtel Château d'Eau. Largely inspired by the 70s, it gives pride of place to warm, variegated and vibrant colors, all in a cozy and intimate atmosphere. A design by Necchi Architecture, which will draw references from a style rarely seen today