Indian Village Site (Witrock Area) - Credit: Wikimedia Commons
Indian Village State Preserve, or the Wittrock Indian Village State Preserve, is a state archaeological preserve near Sutherland, Iowa. The property preserves the Indian Village Site (13OB4), a prehistoric fortified village of the Mill Creek culture. It was declared a National Historic Landmark in 1964, and made a state preserve in 1968. It is located east of Sutherland, south of 455th Street and west of Yellow Avenue. Access to the preserve requires crossing private land. Read more on Wikipedia
Source: en.wikipedia.org