Ozark Iron Furnace Stack - Credit: Wikimedia Commons
Ozark Iron Furnace Stack, also known as the Ozark Iron Works, is a historic iron furnace located near Newburg, Phelps County, Missouri. It was built in 1873, and is a pyramidal shaped furnace stack constructed of hard, compact, fine-drained sandstone blocks on a solid rock foundation. It measures approximately 40 feet in height. The furnace was in operation until 1884. (includes 8 photographs from 1960, 1969) The furnace is located mostly on private property and may not be visible from public right-of-way. Read more on Wikipedia
Source: en.wikipedia.org