This is one of the best historical museums in Minnesota if not the nation and compares favorably…read morewith the best museums I've visited around the world. It covers the history of Spring Valley and its environs from before 5,000 BC to the present, focusing on the Wilder family and the history of this area during the late 19th and early 20th centuries. Frankly, I could simply not believe depth and breath of the exhibits here when I recently visited for the first time. I learned many interesting, why-did-I-not-know-this facts. The Wilder family, for example, made a sizeable contribution for the construction of the Methodist church in which the museum is located. Almonzo Wilder, who married Laura Ingalls, had a childhood friend named Richard Sears, who went on to found Sears with his partner, Alvah Roebuck. And, it really surprised me to learn that Dr. Henry Plummer, the Mayo brothers' right hand man, graduated from Spring Valley High School. There is much, much more. If you want to learn about Minnesota, visit this place and skip the State Fair this year.