 So, I mean, coming from a place in which the Grand Canyon was considered valueless in this way, and then looking at the way we see it today, there's quite a gap there. And I don't think we can understate how value-full, I guess, we see the Grand Canyon today, right? Like, it is iconic in so many ways. And you're tracking that kind of metamorphosis in this book. You do this through a variety of things. You