Underground City, Montreal

The world's largest underground pedestrian network shelters Montrealers from both the scorching heat of summer and the frigid winter winds. More than 30 kilometers of passageways link the stations of Montreal's metro and contain (at last count) 1600 boutiques, 200 restaurants, 34 cinemas and 1600 apartments. Some 500,000 people use it every day. Although the area stays open as long as the Metro stations themselves, the best time to visit is between 9a-11a and 2p-4p, when it is least crowded. Contact the public transit authority for transportation information.