Montreal's towering skyline is concentrated in the Downtown area, its nexus of commerce and commercialism. A suffusion of luxury hotels, flagship stores, high-end restaurants, and corporate headquarters characterize the neighborhood, which by nightfall transforms from a business district into a youth-culture hotspot, with hip bars, clubs, and restaurants heavily peopled by students and young professionals. The once-seat of millionaire's 'Golden Square Mile', an incongruity of stately mansions and dapper brownstones sit between glass skyscrapers, creating a visually lush urban landscape. Beneath the sidewalks lay the Underground City, the world's largest below-ground mall, a labyrinth of over 1,500 shops and eateries that echo the profusion of cafes, gallerias, cinemas, and fashion outlets above. From the scholarly array at McGill University to the carousing crowds of Rue Crescent, visit Downtown to shop by day for what you'll wear there by night.