Cherry Valley Coke Ovens - Credit: Wikimedia Commons
The Cherry Valley Coke Ovens consisted of 200 coke ovens built by the Leetonia Iron and Coal Company around 1866, near Leetonia, Ohio, United States. The function of the "beehive" coke ovens was to purify coal and turn it into coke. The coke was burned in furnaces that produced iron and steel. Read more on Wikipedia
Source: en.wikipedia.org