riverboat casino in Baton Rouge Louisiana. NASHVILLE - JUNE General Jackson Riverboat cruises down the Cumberland River June 14, in Nashville, TN. riverboat casino in Baton Rouge Louisiana. . riverboat casino in Baton Rouge Louisiana. All aboard on one of the largest showboats ever built, the General Jackson Showboat. From dinner cruises to private events, you will have a great time. NASHVILLE - JUNE General Jackson Riverboat cruises down the Cumberland River June 14, in Nashville, TN. NASHVILLE - JUNE General Jackson Riverboat cruises down the Cumberland River June 14, in Nashville, TN.