Irked me too. I'm running for state representative in House District 9, which covers much of that area. The district is drop dead gorgeous and it's growing rapidly. There's a lot here.
Illegitimis non carborundum?
Earth has a lot of nice places. The flatness of Indiana can be calming and beautiful. But if you're driving on main roads, it's not very exciting, and it's not the kind of exciting people will fly across the world to see. And that was the point in the article.
I'm not saying Indiana on the whole isn't flat. When I was growing up, their ad campaign was literally "there's more than corn in Indiana". I'm just saying, he couldn't have picked a worse map location to make the point with.
I'd say the caves in that region of the state are interesting, but options like Mammoth Cave are not that far away in KY (and they have better hills too).