Farrandsville Iron Furnace - Credit: Wikimedia Commons
Farrandsville Iron Furnace, also known as Lycoming Coal Co., is a historic iron furnace located at Colebrook Township in Clinton County, Pennsylvania about 6 miles northwest of Lock Haven. It was built between 1836 and 1837, and measures 43 feet square by 54 feet high. It is a rare example of an early attempt to adopt coke as a blast furnace fuel. Read more on Wikipedia
Source: en.wikipedia.org