Sarrebourg is a small town in the Moselle valley of Lorraine, close to the Alsatian border. It's an unhurried place without obvious tourist ambitions — which makes its single great attraction all the more striking. The Chapelle des Cordeliers houses a monumental stained-glass window designed by Marc Chagall in 1976: twelve metres wide and ten metres high, in deep blues and purples depicting themes of peace, it's one of the finest examples of 20th-century religious art in France.
The town also has a decent regional museum covering the Gallo-Roman heritage of the area, and the surrounding countryside — the Pays de Sarrebourg, edging into the Vosges — is pleasant cycling territory. Twenty kilometres east, the Saint-Louis-Arzviller inclined plane is an extraordinary 1969 boat lift that replaced 17 canal locks with a single inclined caisson. But be honest: most people come for the Chagall, as they should.