Huff Archeological Site - Credit: Wikimedia Commons
The Huff Archeological Site is a prehistoric Mandan village in North Dakota dated around 1450 AD.State Historical Society of North Dakota It was discovered in the early 1900s.National Park Services The site has been designated a National Historic Landmark,National Register of Historic Places and is one of the best preserved sites of the period.National Park Services Read more on Wikipedia
Source: en.wikipedia.org