Here is a show we ran across a while ago on the Smithsonian Channel:
Aerial America | Smithsonian Channel
I think you can see them through iTunes and the Smithsonian app (and the Smithsonian Channel on Apple TV).
Each episode covers a state. They basically just fly over the state with a narrator describing points of interest, history, interesting things, etc. It can get a bit monotonous and/or boring at points. I've watched a few (some of states we haven't yet visited and some of states we've had) and learned of a few spots we may go visit in the future.
So if you're curious, or need a nap LOL, just watch one of these.