Lucca is a city on the Serchio river in Italy’s Tuscany region. It’s known for the well-preserved Renaissance walls encircling its historic city center and its cobblestone streets. Broad, tree-lined pathways along the tops of these massive 16th- and 17th-century ramparts are popular for strolling and cycling. Casa di Puccini, where the great opera composer was born, is now a house museum.