In 2007, Montréal’s Igloofest, an outdoor festival of music and ice, attracted a crowd of 4,000. Today, tens of thousands of electronic music fans flood the Old Port, where top DJs spin infectious grooves amid ice-and-steel structures that reimagine traditional igloos into awe-inspiring feats of engineering. Spread out over four weekends, this frigid fête heats up with outdoor concerts under the stars and interactive installations that combine classic projection with LED technology. Revelers in eye-catching winter-wear can enter Iglooswag, a one-of-a-kind competition that proves fashionable gear is the ideal accessory to this unique gathering.