F. W. Fitch Company Historic District - Credit: Wikimedia Commons
The F. W. Fitch Company Historic District is a nationally recognized historic district located in Des Moines, Iowa, United States. It was listed on the National Register of Historic Places in 2013. At the time of its nomination the district consisted of five resources, including three contributing buildings, one contributing structure, and one non-contributing building. The industrial buildings were built piecemeal between 1917 and 1944 on the west side of the central business district. The main building (1917) and its addition (1929) are located on the north side of Walnut Street, and the soap plant (1929 & 1942) and the soap plant annex (1944) are located on the south sides of Walnut Street. The contributing structure is a tunnel under Walnut that was built either in 1929 or 1942. Read more on Wikipedia
Source: en.wikipedia.org