Wife and I stayed in the Chattanooga Choo Choo hotel. You can rent out a train car as your your hotel room. We loved it and loved the area.
The Chattanooga Choo Choo area has a lot of shops, touristy stuff around it.
I went with my wife way back in 2004. Wife and I did one of those joke old looking photos where I was dressed as a Confederate officer. Oooooh I know bad! I am a terrible person! I violated woke law, but hey it was 2004.
The train does not move. You just stay the night in one of the train cars.
You also can't go wrong visiting Lookout Mountain, Rock City, Ruby Falls, etc.
I also recommend the battlefields around Chattanooga and Chickamauga in Georgia.
The Tennesee aquarium is disappointing to see though after you seen the Big Show at the Georgia aquarium.
www.choochoo.com