Spend your fourth day in the Latin Quarter exploring the vibrant food scene and local markets. Start your day with a visit to the bustling Marché Monge, a traditional French market where you can sample fresh produce, cheeses, and pastries. Afterward, head to the famous Rue Mouffetard, a lively street lined with gourmet shops and food stalls. Treat yourself to a delicious lunch at one of the many charming cafes or bistros in the area. In the afternoon, join a food tour to discover the hidden culinary gems of the Latin Quarter. Sample traditional French delicacies like macarons, cheese, and wine. End your day with a romantic dinner at a cozy restaurant, savoring classic French dishes.