By all means, visit some of the stables in the Lexington area. The horses live better than humans. Keeneland Race track in Lexington is absolutely beautiful (more than Churchill in my opinion), Also, about 40 miles south of Lexington on I-75 exit 77, are a couple of must sees in Berea,KY.
Berea College is located there. The school charges no tuition, but all the students must work as they learn a craft. The output of their labor is sold in the local shops, and you can watch them work. Beautiful wood projects, loom weaving, and my personal favorite, Boone Tavern, owned and operated by the school. Fantastic food, including Kentucky Spoon Bread (wear a belt that stretches). I don't know if its still true, but men were required to wear ties to dine there. They even had loaner ties for the uninformed. Its worth wearing a tie.
Retired and visiting as much of this beautiful country as I can.