Montreal's Réso, commonly known as the "Underground City," is a remarkable feat of urban planning, forming the world's largest pedestrian subway network. Spanning more than 20 miles beneath Downtown Montreal, this subterranean system is far more than just a transit route; it's a dynamic environment featuring interconnected shopping malls, public art installations, and diverse dining options. Originally conceived in the 1960s to ease pedestrian movement, it has evolved into a vital component of c...