From the minute it opened--on Christmas Day in 1865--it was Chicago's must-see tourist attraction, drawing more than half a million visitors each year. Families, visiting dignitaries, even school groups all made trips to the South Side to tour the Union Stock Yard. There they got a firsthand look at the city's industrial prowess as they witnessed cattle, hogs, and sheep disassembled with breathtaking efficiency. At their height, the kill floors employed...
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History