Holtkamp Round Barn - Credit: Wikimedia Commons
The Holtkamp Round Barn is a historic building located near Salem in rural Henry County, Iowa, United States. It was built in 1918 by its first owner B.J. Holtkamp who used the plans drawn up by Matt L. King. with The building is a true round barn that measures in diameter. It is constructed of clay tile from Mt. Pleasant Brick & Tile Mfg. Co. of Mt. Pleasant, Iowa and features an aerator, hay carrier, and a two-pitch roof. It has been listed on the National Register of Historic Places since 1986. Read more on Wikipedia
Source: en.wikipedia.org