Apparently you didn't ride the streetcars in the downtown area or go to the tourist areas at Mud Island and did not visit or stay at the Peabody Hotel.
You can catch the streetcars right outside the door of the Amtrak Memphis Central Station at Main and Calhoun Streets.
Tours to Graceland are available from the Peabody.
If your are going to rent a car and go to Nashville you can also use it to go
to Tunica, Mississippi, the large gambling area just south of Memphis on US Route 61.
Tours to the casinos are also available from the Peabody Hotel.