There are also other options that are just as novel and memorable as a world cruise here in the U.S. There is cross country train in a sleeper car. Appalachian hiking trail from Georgia to Maine. Guided or unguided wilderness tours that drop you off in the middle some of the most beautiful breathtaking backcountry known mankind far from civilization. So many things to do and places to see.
You can even use uCrank's house up in the Great White North as a base if operations.
good luck to you I hope you always find the utmost enjoyment in whatever you do.