My wife and I spent a week in Montreal, Canada, where the weather was unpredictable. We spent some time relaxing in our hotel room, watching Meteo Media (the French-language weather channel) or shopping in the world's largest underground city, La Ville Souterraine. But on the sunny days, we soaked up the excitement and energy of this cosmopolitan city of two million people. Whenever I opened a map on the street, friendly passersby offered to help. Thank you, Montrealers!