I think any route route you take other than the CZ will offer a bit more adventure simply because it will be new to you:
• EB to CS
• SWC to CS
• TE to CS
You can use Amtrak's Route Guides to read about what's on each route or see for yourself by using the Directions mode of Google Maps when it's switched over to the Satellite mode:
• Open up Google Maps
• Click "Directions"
• Enter the end points, e.g., "Amtrak Palatka FL" and "Amtrak New York City NY"
• Click "Search"
• Select the "Transit" icon - looks like a bus
• Select "Schedule Explorer"
• Select "Silver Meteor"
• Select "Satellite"
The route will be highlighted in blue. Each route will be different, of course, and what I might find highly interesting may be excruciatingly boring to you.