If you're ready for a fascinating adventure, put on your walking shoes and bring your curiosity. Embark on a walking tour of Montreal’s RESO, or "la ville souterraine," the world's largest underground pedestrian network. The tour is perfect for the bitter cold of winter or summer’s heat.  After meeting your local guide downtown, you’ll head underground to experience the network of subterranean tunnels, passageways, and buildings. With its start in the early 1960's, the RESO has blossomed into 21 miles of tunnels and passageways that connect office towers, shopping centers, performing arts venues, hotels, university pavilions, department stores, exhibition halls, and the metro system.  As you walk through the underground network, you will discover creative artwork, interesting spaces, and cutting-edge architecture along the way. The tour pops above ground on occasion for you to visually and spatially get your bearings and to see outdoor points of interest. Enjoy the personalized experience that comes with your own local private guide!