Address 10956 North Dickson Mounds Road Lewistown, IL 61542 Hours Daily 8:30 A.M. - 5:00 P.M. Closed New Year's Day, Thanksgiving, and Christmas. Contact Information Telephone: 309-547-3721 FAX: 309-547-3189 Email: Parking/Accessibility Directions 60 Miles northwest of Springfield, Routes 78 and 97 Location on MapQuest. Visitor Information