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