What am I missing in my gray states?

As you can probably tell, most of my state travel so far has included visiting national parks, beaches, or major cities. I honestly don’t know a whole lot about the states in gray. Is there anything you can recommend that I am missing?

As you can probably tell, most of my state travel so far has included visiting national parks, beaches, or major cities. I honestly don’t know a whole lot about the states in gray. Is there anything you can recommend that I am missing?