In Chicago the Union Stockyards opened it livestock market, housing thousands of animals for swift and efficient slaughter. The centerpiece of the massive Chicago meat-packing industry, the market in the city's famous "Square Mile" immediately became a popular tourist attraction and remained so for decades. (By John Osborne)
Source Citation
Dominic A. Pacyga, Slaughterhouse: Chicago's Union Stock Yard and the World It Made (Chicago, IL: University of Chicago Press, 2015), 5.