One of the most spectacular structures in Montreal’s Saint-Henri neighborhood looks like a supervillain’s lair. Dozens of tightly-packed silos form a massive wall, flanked by two derelict towers. The Canada Malting Silos have been described as a “cathedral of industry.” For Montreal’s urban explorers and graffiti artists, they’re more of a Mount Everest. The silos’ resemblance to a pack of beer cans is entirely appropriate, as Canada Malting was once a key supplier to many distilleries and breweries. Built in 1905, its first 11 silos were insulated with terracotta tiles….