Hi MilesandSmiles, and Welcome to the Great American Roadtrip Forum.
Love your user name, and can only imagine the great trips you have had. Thanks for jumping in with that suggestion. I use that site a lot, to find scenic routes, not all of which are marked on maps. There is also a great book published by National Geographics on scenic highways and byways across North America. And often you find that State maps have scenic routes which are not marked anywhere else.
Anytime you need help with any suggestion, feel free to start your own thread.
Lifey