The Audrain County Historical Society Museum Complex is housed on the eleven-acre Robert S. Green Memorial Park.  Graceland is one of the oldest homes still standing in the county.  This Greek Revival home was built in 1857 by John P. Clark.  It is a favorite rumor that General Ulysses S. Grant visited that house during the Civil War.  The first blooded horses were brought to the area from Kentucky by the second owner, Colby T. Quisenberry.

In 1970, the American Saddlebred Horse Museum was built as an addition to Graceland and is the oldest Saddle Horse museum in the country.  The museum traces the history of the American Saddlebred and the important world-wide role played by Audrain County in the development of the beautiful breed.  Tom Bass, one of Mexico's famous residents, was an African-American horse trainer.  He won countless ribbons and trophies for world class riding and training, and his collection is on display in this museum.  Also featured are George Ford Morris, local trainer Arthur Simmons, and Callaway Hills stallion Will Shriver.  The invincible  American Saddlebred Rex McDonald is buried on the grounds.  The permanent addition of "Champion" to Rex McDonald's name was gained in 1903 when he was crowned Champion Saddle Horse of America at the St. Louis Fair, giving Mexico recognition as the "Saddle Horse Capitol of the World."

The Country School was originally built in 1903 and moved to the grounds in 1989, and is now set up as a typical rural school house with the original desks, a slate blackboard, and other period items.
  

Prairie View Christian Church was built in 1889 and moved to the complex in 1998.  The Country Church features the original theatre-style seats, and has been completely restored.  It is still used for weddings and family and community events. The grounds of the museum include a gazebo and walking path with gardens featuring flowers and landscaping popular in the early 1900s.

Graceland, 1890