Best Free Midwest Attractions: North Dakota
A suburban mansion, pioneer-style
Fort Union Trading Post National Historic Site, Williston Now reconstructed, Fort Union was the most important fur-trading site on the upper Missouri from 1828 to 1867. The imposing white house at Fort Union (left), where the head merchant lived, looks strangely grand against the landscape, like a suburban mansion built expressly to outshine its neighbors. That's exactly what it was; traders built it in 1828 to impress area tribes. A self-guided tour, ranger-guided tours and living-history programs are available for visitors.