Bernard H. Pietenpol Workshop and Garage - Credit: Wikimedia Commons
The Pietenpol Workshop and Garage is a small building in Cherry Grove, Minnesota, United States, where aviation pioneer Bernard Pietenpol designed and built aircraft. The wood-framed structure was added to the National Register of Historic Places in 1981. The original hangar from Pietenpol Field was moved to Pioneer Airport in Oshkosh, Wisconsin. Read more on Wikipedia
Source: en.wikipedia.org