William Hill Polygonal Barn - Credit: Wikimedia Commons
William Hill Polygonal Barn, also known as the Hill-Mershon Barn, is an eight-sided barn located at Bloomingdale, Parke County, Indiana. It was built about 1905, and is a two-story, octagonal frame building. It measures 30 feet in width and is topped by a sectional cone roof topped by an octagonal cupola. Note: This includes and Accompanying photographs. Read more on Wikipedia
Source: en.wikipedia.org