Fodor's Expert Review Coulée Verte René-Dumont/Promenade Plantée

Once a train line from the Paris suburbs to Bastille, this redbrick viaduct (often referred to as Le Viaduc des Arts) is now one of the park highlights of the unpretentious 12e arrondissement. The rails have been transformed into a 4½-km (3-mile) walkway lined with trees, bamboo, and flower gardens, offering a bird's-eye view of the stately Haussmannian buildings along Avenue Daumesnil. Below, the voûtes (arcades) have been transformed by the city into artisan boutiques, many focused on decor and design. There are also temporary galleries showcasing art and photography. The Promenade, which gained fame as a setting in the 2004 film Before Sunset, was the inspiration for New York's High Line. It ends at the Bastille. From there, you can continue your walk to the Bois de Vincennes. If you're hungry, grab a bite at L'Arrosoir, a cozy café under the viaduct ( 75 av. Daumesnil).