I-40 From Tennessee to California

Someone who I have forgotten once said the interstates allow you to go from coast to coast and never see anything and there’s a lot of truth in that. I’m sure there’s much to see in AR, some around the OKC area, NM and AZ. But you’d have to get off I-40 to see most of it. If you stick to the freeway I can’t think of much until you get to the places mssmith1199 mentioned, though I’d add the Petrified Forest, Painted Desert and maybe Sunset Crater NM to it.