The coastal area of Marennes is famed for its oyster farms and Cité de l’Huître, an interactive oyster museum on the Chenal de Marennes waterway. Lined with al fresco eateries, Marennes-Plage is a sandy beach facing the island of Oléron, while inland 15th-century Église Saint-Pierre overlooks narrow streets of elegant townhouses. An adventure park on the grounds of Castle Gataudière has zip lines and paintball.