As usual, the pictures are sooooo good! Fabulous colors. Chattanooga is a very busy city and worth a few days to see all the attractions. You must do the river boat, downtown river walk, and go to Chattanooga Choo-choo (just for a few hours, not a whole day). Of course, the aquarium has a lot of beautiful stuff, too, but it's only one of the many attractions! The civil war park at the top of Lookout Mountain will keep you busy for hours and hours. I know how much you liked Gettysburg! Give Chattanooga another chance, but plan at least a weekend there!
Glad you both enjoyed your anniversary travel!