My family and I will be driving around the USA this summer — east and west coasts, and across the southern coastal states. We'll be doing sightseeing, but I'm also wary of missing a lot of scenery by staying on interstates the whole time. What are some practical ways that I can identify portions of the country where it would be worthwhile to get off the interstate and take state routes?
I'm sure each small town tourist department will recommend that I drive slowly by their businesses, but on a nation-wide trip, how can I find the most scenic routes?