Fodor's Expert Review Collégiale St-Martin

St-Rémy is wrapped by a lively commercial boulevard, lined with shops and cafés and anchored by its 19th-century church Collégiale St-Martin. Step inside—if the main door is locked, the side door is always open—to see the magnificent 5,000-pipe modern organ, one of the loveliest in Europe. Rebuilt to 18th-century specifications in the early 1980s, it has the flexibility to interpret new and old music with pure French panache; you can listen for free on weekends mid-April–September.