If you enjoy cycling I highly recommend riding Amtrak somewhere you'd like to explore by bicycle with your whip checked "trainside" where it's fully assembled and ready to ride. There's something magical about getting off the train in a different state with your bicycle ready to go no worse for wear. Especially at smaller stations, where the conductor or luggage handler will directly hand you the bicycle from the lug…
Depends where you are of course. I used to ride Amtrak a lot between Orlando and Miami. In neither city is the station particularly convenient to downtown, especially in Miami.