With a normal January temperature of -9 degrees Celsius, you can comprehend why Montrealers would want to remain inside. This does not mean they remain at home, however. It just implies that the number of inhabitants in Montreal's city beneath the city, RÉSO, sees a populace blast amid the winter months. Under the avenues of the Quebec city lies 32 km of passages connecting more than twelve square kilometers of downtown Montreal. Malls, more than 30 films, display edifices, a library, historical centers, lodgings, 200 eateries, and even college structures involve more than 60 business and private buildings; making it the greatest underground system on the planet.