LOUISVILLE, Kentucky's largest city, sits on the Ohio River along the Indiana border and is home to Muhammed Ali, a global icon.  The Muhammed Ali Center, Churchill Downs and the Louisville Slugger Factoruy top the city's many attractions. The long history of the Kentucky Derby is explored at the Kentucky Derby Museum. Baseball is celebrated at the Louisville Slugger Museum and Factory, where Major League bats are produced and a giant baseball "slugger" marks the entrance.