Dedicate your second day to exploring Metz's impressive museums. Begin with the Centre Pompidou-Metz, a contemporary art museum known for its striking architecture. Marvel at the diverse collection of modern and contemporary artworks. Next, visit the Musée de la Cour d'Or, which showcases the rich history and heritage of Metz. Explore the archaeological and fine arts sections, and learn about the city's Roman past. Wrap up the day with a visit to the FRAC Lorraine, a contemporary art center that hosts thought-provoking exhibitions.