Aix-les-Bains (US: , French: [ɛks le bɛ̃] (listen); Arpitan: Èx-los-Bens; Latin: Aquae Gratianae), locally simply Aix, is a commune in the department of Savoie, in the southeastern French region of Auvergne-Rhône-Alpes.Situated on the shore of the largest natural lake of glacial origin in France, the Lac du Bourget, this resort is a major French spa town, and has the largest freshwater marina in France.