NASHVILLE - JUNE General Jackson Riverboat cruises down the Cumberland River June 14, in Nashville, TN. riverboat casino in Baton Rouge Louisiana. All aboard on one of the largest showboats ever built, the General Jackson Showboat. riverboat casino in Baton Rouge Louisiana. 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. . riverboat casino in Baton Rouge Louisiana. NASHVILLE - JUNE General Jackson Riverboat cruises down the Cumberland River June 14, in Nashville, TN.