The Audrain County Historical Society is located within the 11-acre Robert S. Green Park in central Mexico, Missouri. There, visitors will find the ante-bellum Graceland Museum (1857), (listed on the National Registry of Historical Places), the American Saddlebred Horse Museum (established 1970), Country School, and the Country Church.
Today nine of Graceland's rooms house displays that allow visitors to experience the Victorian elegance of the past as well as the rich history of the country. Books, maps, photos, etc. on local subjects are available in the library for use by historians and genealogists.