The Union Stock Yards opened on Christmas Day in 1865. At their height they covered 475 acres and handled about 15 million head a year. They closed in 1971.
The limestone gate on Exchange Avenue dates to the 1870s and was designed by Burnham & Root, with a stone bull's head over the arch. It became a Chicago Landmark in 1972 and a National Historic Landmark in 1981.
A memorial nearby honors the 21 firefighters killed in the 1910 yards fire. It was dedicated on December 22, 2004.
This is the Exchange Avenue tee, also available as a heavyweight.